Ideally for the CD32 version of Beneath a Steel Sky via WHDLoad with full Pre-Load you need 64mb Ram
If you check the CD for Simon the Sorcerer it might have an executable you can run, therefore you could just copy the files to your HDD and create an assign, it works for some Amiga CD and CD32 Games

There's also software you can get on Aminet to mount ISO's from your CF HDD.