(re: manhunter issue)
This is a problem that some modern graphics cards have with running old AGI games. The solution is easy. Just run the game with NAGI, http://www.agidev.com/projects/nagi/ or with DOSBox, http://dosbox.sourceforge.net/
NAGI, a new third party AGI interpreter, gives you a very convenient way to run all of your AGI games. You even will get all three MIDI voices through your sound card instead of just one through your PC speaker.
DOSBox is a DOS emulator that you can run many of your old DOS games in when you have trouble running them in Windows. Best of all both NAGI and DOSBox are free.