Just got the Max Pack yesterday... awesome game, but there are some technical issues.
The game looks okay in low res, but I'd love to see it in hires or 3DFX mode. Unfortunately, I also get the "Failure: DatafileStack type mismatch, wanted 2, got 2" error when I try to start a race in Hires mode in either Carmageddon or the Splat Pack. Oh, I do have the Max Pack, but don't see anything in the readme about there not being a hires mode; it just says that you can access the hires mode by typing 'hires.bat' in the folder, not that there isn't one. That doesn't imply to me that this version is missing the hi-res mode... hires.bat exists in the carma folder, etc.
Also, the first time I won a race in the Splat Pack, the screen went black and stayed that way, and I had to just close DOSBox. Either the disc is scratched or something or something weird is wrong... that doesn't happen with the original game, I've finished several races in that game without that problem.
And of course I don't know of any way of using the 3DFX mode in Vista... the one version of DOSBox I have with Glide support seems to just crash with the game, and software emulators would need display drivers that support fullscreen DOS mode, right? Vista (or is it just NVidia's drivers?) of course doesn't allow that.