Well, I tried 640x200 and 640x400 NTSC modes and they didn't work. I guess I could install Picasso 96 and try a larger screenmode if that would help(it has a CV64/SD installed) but I was trying to back up the hard drive before I changed too much on the system.
Is anyone using MakeCD on the standard NTSC screenmodes with 3.1? I suppose I could go back to MasterISO, but I read MakeCD is newer/better.