Since Ramble discontinued his MyInventory project and I didn't want to use his new 'MyBags' project for ACUI I was stuck with either using the Blizzard bags or updating this one myself. This is the updated 10900 code which I use in ACUI.
Original code and credits go to Ramble!

This addon places all your bags in one frame and replaces the default inventory windows.
Features:
* Bagslot Icons in window for switching bags
* Displays total bag slots (lower left corner)
* Quality color borders on uncommon and higher items
* Quivers/Ammo Pouches are colored black.
* Totaly Stand-Alone
* Display options: Turn Artwork on, or turn background completly off
* Configuration Menu
* Highlighting Bagslots and items slots so you can tell which items belong to which bags
* Scaling
* Don't take over Ammo Bags