Hi everyone. I have Leopard 10.5.8 on my MacBook. I do not have any install or restore discs for it. I need to upgrade to Snow Leopard for work, since I need a newer version of Firefox. Since I have lots of software, no discs for Leopard or anything else, and very little money (so, limited backup options), I'd like to find a way to keep everything as similar as possible. Is there a way to create a partition on my HDD and install Snow Leopard on it so that I can use that with the newer Firefox for work and still keep Leopard for everything else? Or, if I installed Snow Leopard on top of Leopard (not a clean install), would there be a good chance of it working absolutely seamlessly and having no issues with Photoshop CS 8.0, iLife '07 (I think), or anything else? What would be the best method? Looking for something easy, straightforward, with little risk. Thanks!