okay, and do i need to compile mac version on ppc version or is the program all set up for use?

okay, so do I need a zip extractor to open .exe or something like virtualPC?

Before i buy Grim Fandango I need to know if ResidualVM and Grim will run on my iMac g3 400mhz , 1gig of ram, 8mb ati rage video, and os tiger 10.4/ os9.