Guess that someone will be me..

If I remember this correctly, wasn't Jazz2 originally supposed to be played on 320x200, or in other words the DOS resolution, aswell? When playing the OEM version, you can still see backgrounds and other level design made for a resolution lower than 640x480. Also, Jazz2 on DOS is an interesting thought. It would have given us way less compatibility at the time when Win2k/XP became popular without DOSBox being invented yet lol, but some of the computers I've used in 1998 were unable to run JJ2 cause those still used Windows3.1 and DOS.