I would think you could just "PUSH" the new files to the DROID to the location where they are stored. same file name should do the trick ?You have to be rooted and then install Metamorph themes or flash a ROM that comes with a theme.
The volume widget is AudioManager, it is free in the market.
it would be sweet to change the colors of the volume bars. I dislike the current colors. might be some thing I look into.
now if only I can open APK files I am sure I could change the colors of those bars.
-=Jason=-
apk files are just a zip file with a different extension. It's possible to open them up and peek around at what's inside.
Reinstalling them afterwards, though, is a different story altogether.
-=Jason=-