AdvanceMame/Menu problem

[AlmtyBob]

I'm using a j-pac to build a mame cab. I'm mostly done now, video works, sound works, etc.  However, when I try to launch most games I get a fuzzy picture, I'm assuming that the res isn't supported by my monitor.  I tried using advv.exe to delete the unworking modes, but I'm not sure how, it's not listed in the documentation.  Does anyone know how to remove modes? (make them red instead of blue)

Also, advmenu only takes up half the horizontal width of my screen, and it doesn't detect the fact that I've loaded up about 3000 additional games and 3000 snapshots, it just shows the 2 games I used to have loaded in there, the rest are greyed out, how do I fix this?

Thanks