True all black background white font theme for 8900?

Hello all.

I am setting up a curve 8900 for my brother in law. He is legally blind, but can function with some help on his blackberry.

I have turned on the "reverse contrast" feature, and that works wonderfully....except for the homescreen also being inverted. I downloaded a them "18 Icon" which takes away the home screen image and we can hide/show only the icons that he needs. My question is this: Does anyone know of any way that I can edit this theme using theme builder to setup this theme with the black background/white letters? I have the theme downloaded onto the phone, but cant transfer it to my desktop to edit though.

If someone knows of a theme with the reverse contrast/black background with white letters that I could use, I would greatly appreciate it.

Thanks so much for any help.