i'm gettin it from a guy who doesnt' know much about it Machine Model: eMac CPU Type: PowerPC G4 (3.3) Number Of CPUs: 1 CPU Speed: 1 GHz L2 Cache (per CPU): 256 KB Memory: 256 MB 80GB HD superdrive not sure which machine this is- rev b, c, or d how do i find out? how easy is it to add more ram to this machine? what about boost the HD? this one takes an airport extreme card right? easy to put in? any site where i can go to find out all that info? etc? thanks!