Plazmic Theme builder 4.7 or 4.6( do not think too many people are still using the older builds to make themes anymore then again I could be wrong) and it can be found by googling or going to the Blackberry/Rim website. Just google, download it, there is no extracting of zip file, it is an executable file. It is kind of confusing when you first start(open the theme builder and have at it), but once you have done it for awhile it is lots of fun, can also be tedious. Good Luck and once you have completed your first theme... doesn't matter for what device let us have a look/see.
Enjoy yourself.
Really appreciate it, and will post soonish. thanks!