Plastic Pulse for iTunes 11
A matching iTunes theme for the Plastic Pulse Mountain Lion mod
To install the Plastic Pulse for iTunes 11 theme navigate to your iTunes application, press right click and choose Contents from the contextual menu. In the Resources folder you will be able to find the iTunes.rsrc file.
Backup the file in case you want to restore the default theme and then place the .rsrc file included in the Plastic Pulse for iTunes 11 package in the Resources folder. When you launch iTunes you will be able to see the new theme.