I currently have 10.4.11 running on my Macbook, and getting outdated hasn't been an issue for me until now. Many programs, updates, etc. require my Mac to be at least 10.5, and I have been wrestling with the idea to update or not, and finally I have decided that I think I want to try this. My parents have just recently purchased a Mac mini, and the 10.6.3 installation disk obviously came with it. I have just saved all of my files onto my external terabyte hardrive. Now, my question is, can I update to 10.6.3--using this Mac mini disk--with no issues?? I am afraid of losing my current operating system, and having purchased this Mac in 2007, my start-up disks for Tiger are long gone, so if something goes wrong, then I am sunk. If anyone has any input, please let me know. Thanks!