just wanna make sure. i have an external hard drive full of music and videos and stuff, and i wanna use it on an iMac. i can do that right? i think i read somewhere OS X cant write to NTFS, but can read. so that means i should be able to use my external HD just fine right? also, just while we're on the subject of OS X, when installing Windows using Bootcamp or any other app, will there be formatting of the whole hard drive involved? i know partitions will need to be made, but do i have to reformat the whole drive THEN partition it? or can I do it like Partition Magic does it?