I tried to get it transparent but am not figuring it out.
I did sign it and it installed for me on most just fine. On my DX I had to manually uninstall the stock one, not sure why but it installed fine after that.
This is TheBowers's Background image from Pandora and a few other png edits of my own.
Second widget down
to install copy to sdcard and rename by removing the .zip from the end of the filename. Then with any filebrowser click on the apk and choose install.