Well, I might move to SL soon, but because I've never experienced OS version migration before, I'd like some help with everything. Note: I know that it is possible to install 10.6 from 10.4 using the bare SL disc but it's a risk I won't take so I'm going the safe route and I'll 98% certainly use the SL disc in the Mac Box Set. Firstly, will I need to backup anything, reinstall apps, or such? I know I'll have to update some applications (VLC for example) but I want to know what will happen to my data. Once I finish the installation, will all my data still be there? Am I going to miss or lose anything? Will any files be corrupt or so? Second: How will SL preform on my Late 2006 black MacBook? It's 2ghz, Intel Core Duo 2, with 1 GB of memory, 667 MHz, DDR2 SDRAM. Will it ever hang or otherwise crash abnormally? How much memory could I expect to have left? And most importantly, how do I install it anyway? Thanks for all the help, guys.