Just curious and not too knowledgeable about all of this. I have an Imac DV SE. I only have about 100 mb of memory left on the OSX side of the partition that I use mostly. So, I've decided to add an external HD, but I also want to have a "clean" computer without the partitioned OS9 and X. Can I reformat and then just add(and work from) applications on the external drive? How should I set it up? Or should I just leave it alone and just add the extra external memory for stuff like photos? Any advice would be wonderful.