OK I actually fixed this now. It wasnt having multiple drives. it was somthing to do with the iso image. I think the reason some computers work and some dont is to do with the way the bios controls the cd drive. What I think is the problem is that the iso format cannot store more that 8 sub directories. and the asms folder has 2 folders which are 9... how i fixed it? well Instead of nero, i used alchohol 120%. Loaded the iso, did the image burning wizard, Randonly I choose "Raw SAO". Burn, put the disc in, didnt even bother to reformat just let windows boot as normal and it got past the error. at this point i was well buzzin cos this s***ter cost be 5 wasted cd's heh!! hope this helps someone out there