Unfortunately the original Quest for Glory games ran on Sierra's SGI and not the AGI which is used for the games here. This link has a good write-up about game interpreters: http://oss.sgi.com/LDP/HOWTO/Linux-Gamers-HOWTO/interpreters...

Not the same, but ScummVM supports QFG1/QFG2 now:

http://scummvm.org/