Ed, you're right... they are simply V9T9 format files. Tursi sent me them, but I can't get it to work in Classic99. Perhaps the files he sent are messed up?
For anyone interested, here is the entry in classic99.ini I have for SXB
[usercart0]
; *** Super XB - works
name="Super XB"
rom0=C|6000|2000|MODS\SUPERXBC.BIN
rom1=D|6000|2000|MODS\SUPERXBD.BIN
rom2=G|6000|A000|MODS\SUPERXBG.BIN
I get a prompt, but when I hit enter, it locks up really pretty! 'X' instead of 'D' for rom1 doesn't work. rom2's A000 is the length of the GROM file, but I did try 2000 and no luck at all.
Ben