diff --git a/gravityforms-multiple-form-instances.php b/gravityforms-multiple-form-instances.php
index c8babb1..239a02a 100644
--- a/gravityforms-multiple-form-instances.php
+++ b/gravityforms-multiple-form-instances.php
@@ -26,6 +26,8 @@ class Gravity_Forms_Multiple_Form_Instances {
 	public function __construct() {
 		// hook the HTML ID string find & replace functionality
 		add_filter( 'gform_get_form_filter', array( $this, 'gform_get_form_filter' ), 10, 2 );
+		// hook the multifile upload script replace functionality
+		add_filter( 'wp_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
 	}
 
 	/**
@@ -95,6 +97,14 @@ public function gform_get_form_filter( $form_string, $form ) {
 			'GFCalc(' . $form['id'] . ','                                       => 'GFCalc(' . $random_id . ',',
 			'gf_global["number_formats"][' . $form['id'] . ']'                  => 'gf_global["number_formats"][' . $random_id . ']',
 			'gform_next_button_' . $form['id'] . '_'                            => 'gform_next_button_' . $random_id . '_',
+			'multipart_params":{"form_id":' . $form['id'] . ','  => 'multipart_params":{"form_id":' . $random_id . ',"original_id":' . $form['id'] . ',"random_id":' . $random_id . ',',
+			'gform_multifile_upload_' . $form['id'] . '_'                       => 'gform_multifile_upload_' . $random_id . '_',
+			'gform_drag_drop_area_' . $form['id'] . '_'                         => 'gform_drag_drop_area_' . $random_id . '_',
+			'gform_browse_button_' . $form['id'] . '_'                          => 'gform_browse_button_' . $random_id . '_',
+			'gform_preview_' . $form['id'] . '_'                                => 'gform_preview_' . $random_id . '_',
+			'gform_multifile_messages_' . $form['id'] . '_'                     => 'gform_multifile_messages_' . $random_id . '_',
+			'gform_uploaded_files_' . $form['id']                               => 'gform_uploaded_files_' . $random_id,
+			'gformDeleteUploadedFile(' . $form['id'] . ','                      => 'gformDeleteUploadedFile(' . $random_id . ',',
 			$hidden_field                                                       => "<input type='hidden' name='gform_random_id' value='" . $random_id . "' />" . $hidden_field,
 		);
 
@@ -109,6 +119,17 @@ public function gform_get_form_filter( $form_string, $form ) {
 		return $form_string;
 	}
 
+	/**
+	 * Enqueues the multifile upload script in wordpress scripts.
+	 *
+	 * @access public
+	 *
+	 * @return void
+	 */
+	public function enqueue_scripts() {
+		wp_enqueue_script( 'gform_mfi_multifile', plugin_dir_url( __FILE__ ) . 'js/gravityforms-mfi-multifile.js', array( 'jquery', 'gform_gravityforms' ) );
+	}
+
 }
 
 // initialize the plugin
diff --git a/js/gravityforms-mfi-multifile.js b/js/gravityforms-mfi-multifile.js
new file mode 100644
index 0000000..ecfd684
--- /dev/null
+++ b/js/gravityforms-mfi-multifile.js
@@ -0,0 +1,32 @@
+//----------------------------------------
+//------ MULTIFILE UPLOAD FUNCTIONS ------
+//----------------------------------------
+
+(function (gform, gfMultiFileUploader, $) {
+    $(document).bind('gform_post_render', function(e, formID){
+        $("form#gform_" + formID + " .gform_fileupload_multifile").each(function(){
+            var settings = $(this).data('settings');
+            var uploader = gfMultiFileUploader.uploaders[settings.container];
+            uploader.bind('BeforeUpload', function(up, file) {
+                uploader.settings.multipart_params.form_id = uploader.settings.multipart_params.original_id;
+            });
+        });
+    });
+
+    gform.addFilter('gform_file_upload_markup', function(html, file, up, strings, imagesUrl){
+        var html = '<strong>' + file.name + '</strong>';
+        var formId = up.settings.multipart_params.random_id;
+        var fieldId = up.settings.multipart_params.field_id;
+        html = "<img "
+            + "class='gform_delete' "
+            + "src='" + imagesUrl + "/delete.png' "
+            + "onclick='gformDeleteUploadedFile(" + formId + "," + fieldId + ", this);' "
+            + "onkeypress='gformDeleteUploadedFile(" + formId + "," + fieldId + ", this);' "
+            + "alt='"+ strings.delete_file + "' "
+            + "title='" + strings.delete_file
+            + "' /> "
+            + html;
+        return html;
+    });
+
+}(window.gform = window.gform || {}, window.gfMultiFileUploader = window.gfMultiFileUploader || {}, jQuery));
diff --git a/tests/unit-tests/GFMFI_GformGetFormFilterTest.php b/tests/unit-tests/GFMFI_GformGetFormFilterTest.php
index e382454..04ff473 100644
--- a/tests/unit-tests/GFMFI_GformGetFormFilterTest.php
+++ b/tests/unit-tests/GFMFI_GformGetFormFilterTest.php
@@ -494,6 +494,94 @@ public function testGformNextButtonReplacement() {
 		$this->assertSame( $expected, $actual );
 	}
 
+	/**
+	 * @covers Gravity_Forms_Multiple_Form_Instances::gform_get_form_filter
+	 */
+	public function testMultipartParamsAddition() {
+		$input = 'multipart_params&quot;:{&quot;form_id&quot;:' . $this->form['id'] . ',';
+		$expected = 'multipart_params&quot;:{&quot;form_id&quot;:' . $this->randomId . ',&quot;original_id&quot;:' . $this->form['id'] . ',&quot;random_id&quot;:' . $this->randomId . ',';
+		$actual = $this->gfmfi->gform_get_form_filter( $input, $this->form );
+
+		$this->assertSame( $expected, $actual );
+	}
+
+	/**
+	 * @covers Gravity_Forms_Multiple_Form_Instances::gform_get_form_filter
+	 */
+	public function testGformMultifileUploadReplacement() {
+		$input = 'gform_multifile_upload_' . $this->form['id'] . '_';
+		$expected = 'gform_multifile_upload_' . $this->randomId . '_';
+		$actual = $this->gfmfi->gform_get_form_filter( $input, $this->form );
+
+		$this->assertSame( $expected, $actual );
+	}
+
+	/**
+	 * @covers Gravity_Forms_Multiple_Form_Instances::gform_get_form_filter
+	 */
+	public function testGformDragDropAreaReplacement() {
+		$input = 'gform_drag_drop_area_' . $this->form['id'] . '_';
+		$expected = 'gform_drag_drop_area_' . $this->randomId . '_';
+		$actual = $this->gfmfi->gform_get_form_filter( $input, $this->form );
+
+		$this->assertSame( $expected, $actual );
+	}
+
+	/**
+	 * @covers Gravity_Forms_Multiple_Form_Instances::gform_get_form_filter
+	 */
+	public function testGformBrowseButtonReplacement() {
+		$input = 'gform_browse_button_' . $this->form['id'] . '_';
+		$expected = 'gform_browse_button_' . $this->randomId . '_';
+		$actual = $this->gfmfi->gform_get_form_filter( $input, $this->form );
+
+		$this->assertSame( $expected, $actual );
+	}
+
+	/**
+	 * @covers Gravity_Forms_Multiple_Form_Instances::gform_get_form_filter
+	 */
+	public function testGformPreviewReplacement() {
+		$input = 'gform_preview_' . $this->form['id'] . '_';
+		$expected = 'gform_preview_' . $this->randomId . '_';
+		$actual = $this->gfmfi->gform_get_form_filter( $input, $this->form );
+
+		$this->assertSame( $expected, $actual );
+	}
+
+	/**
+	 * @covers Gravity_Forms_Multiple_Form_Instances::gform_get_form_filter
+	 */
+	public function testGformMultifileMessagesReplacement() {
+		$input = 'gform_multifile_messages_' . $this->form['id'] . '_';
+		$expected = 'gform_multifile_messages_' . $this->randomId . '_';
+		$actual = $this->gfmfi->gform_get_form_filter( $input, $this->form );
+
+		$this->assertSame( $expected, $actual );
+	}
+
+	/**
+	 * @covers Gravity_Forms_Multiple_Form_Instances::gform_get_form_filter
+	 */
+	public function testGformUploadedFilesReplacement() {
+		$input = 'gform_uploaded_files_' . $this->form['id'] . '_';
+		$expected = 'gform_uploaded_files_' . $this->randomId . '_';
+		$actual = $this->gfmfi->gform_get_form_filter( $input, $this->form );
+
+		$this->assertSame( $expected, $actual );
+	}
+
+	/**
+	 * @covers Gravity_Forms_Multiple_Form_Instances::gform_get_form_filter
+	 */
+	public function testGformDeleteUploadedFileReplacement() {
+		$input = 'gformDeleteUploadedFile(' . $this->form['id'] . ',';
+		$expected = 'gformDeleteUploadedFile(' . $this->randomId . ',';
+		$actual = $this->gfmfi->gform_get_form_filter( $input, $this->form );
+
+		$this->assertSame( $expected, $actual );
+	}
+
 	/**
 	 * @covers Gravity_Forms_Multiple_Form_Instances::gform_get_form_filter
 	 */