Default Latvian Mac OS X keyboard layout with the ounly change £ <=> #
Before:
After:
git clone git://github.com/duksis/Latvian-pounded.keylayout
mv Latvian-pounded.keylayout/Latvian-pounded.* ~/Library/Keyboard\ Layouts/
rm -r Latvian-pounded.keylayout
After executing this in terminal open "System Preferences" -> "Keyboard" -> "Input Sources..." select the new input source "Latvian-pounded" and activate it the upper toolbar
Layaut created using Ukelele keyboard layout editor.