OK, I managed to repair the runtime error by getting the right game kit. I have an older computer where Jazz 1 works, but it's not mine. The problem is that this older computer has an older video card (witch is good), but my computer has an video card that uses drivers witch do not suport direct access. So, every time I try to run Jazz (or Setup.exe to set sound) I get this error:

[IMG]D:\Error.bmp[/IMG]

It sais there is something wrong with "autoexec.nt" (in case the image above is not displayed). And I have the same error with all MS-DOS games. Can anyone help me with this so I can finally play Jazz 1 on my PC???