registry editing?

[start] --> [run] *type* regedit [open]

go to hkey_current_user,software,epic megagames,jazz2 special edition (or something like that) then to video size.

then make sure the 3 keys are:
name:--- value:
BPP ----- 08 00 00 00
HEIGHT -- e0 01 00 00
WIDT ---- 80 02 00 00

for teh bigggest normal resolution.