Originally Posted by auee
My iTunes music files are stored on an external hard drive. Should I have the external drive mounted when I do the installation.?
Actually during the install procedure I wouldn't have the external connected (it has no influence in the installation process). If you're upgrading (the default for installing SL) then before opening iTunes just reconnect your external and everything should run fine. But if you want to do a clean install (as I always do, things tend to go smoother that way) then you can follow my procedure, that consists in backing up your entire hard drive using Time Machine (if you don't want to back up everything, then copy what interests you to an external hard drive or something, but among those things copy the library folder inside your home folder). Then do a clean installation of Snow Leopard (actually I reformatted the drive before installing) and then, before opening iTunes, inside the copy you made of the library folder there is a folder named iTunes, copy that to the library folder inside your home folder in Snow Leopard (replacing the one that is there if it exists), reconnect your external HDD, open iTunes and voila! all your music and settings are intact.
BTW I installed SL in my MBP (which was a little trickier than that it was supposed to be since the disc drive died a couple months ago), I really like it, and after 10.6.1 is out to correct some bugs I would advice almost everybody that uses Leopard to upgrade (except people that depend on hardware still not supported on SL). Everything I use, with some minor exceptions, has been running even better than in Leopard, and the snappier feeling is really nice, and there are quite a few extra details and refinements in a lot of areas that make it overall a solid upgrade over Leopard.