I have a 1 GHz G4 with 256 MB DDR SDRAM. I loaded 4.11 about two years ago. I now have another computer, and no longer need 4.11 on my desktop since I use it primarily when I have to do a lot of typing and for background music. The 4.11 makes it slow, and I would like to remove it, and go back to 3. I have the original discs for 3 that came with my computer. Is this possible without losing the photos, music, documents? If so, how do it do it? Thanks!