It seems that Mac programs require 1/3rd extra space over the PC counterparts (everything from small stuff like Firefox to larger stuff like Adove Photoshop). This means that I've under-partitioned in size terms the "MacIntish HD" drive (which I think of as the C: drive). I've just tried installing FCP but it requires 50gig! Holy hell. So is this for norm for all? I mean just to install to "Macintosh HD" and have massive hard drives? I partitioned 70gig and now I will see if I can work out how to merge in a 30gig partition (hopefully I can merge partitions somehow without data loss?). But even 100 gig at this rate will not be enough. Even worse iMovie seems decided my library must be on "Macintosh HD" and I have a terabyte of video to work with?!?! TKS in advance.