Hi, I have an iMac purchased back in 2007. It originally came with Tiger, but I've since upgraded it to Leopard, and then again to Snow Leopard. Is there a way I wipe my hard drive clean and still keep Snow Leopard installed? What if I want to keep certain applications I have installed such as Microsoft Office, and Adobe Photoshop and InDesign but erase everything else? Should I just do it manually by dragging it all to the trash and erasing? Thanks!