Key remapping in MAME32

[bishmasterb]

I'm running MAME32 (version .66) on XP Pro. I need to remap the MAME32 UI keys, but apparently version .66 doesn't allow that (if it does, let me know how).

I've tried version.81 of MAME32 (which does support key remapping), but a huge portion of my ROMS don't function (they report as unavailable and either don't work at all, or produce distorted video).

Any ideas on what I can do that don't involve hunting down a bunch of new ROMS?

thanks