Glad you got it sorted. My rtg system is in pieces at the moment so I wasnt able to get back to you with more info in the other thread. Sorry about that. In regards to the black bands, did you try editting the screenmode once you got an image? Shift+left/right/up/down, and the arrow keys by themselves are the most important keys there if I recall (still going by memory).
Seeing as your monitor does 320x2xx you should also have luck creating modes to match all custom chipset modes, which comes in handy at times in my experience.