one thing you can do to be sure is back up your itunes folder, with XML file and everything from your old computer. Install itunes on your new computer and then replace that whole folder with your old folder. Or if you don't want to replace it just tell itunes where to read the library from in the prefs. This is how it works on macs and i would imagine it's the same on pc's (Not tested though.) Maybe someone with a pc can chime in on that but i don't see why it would be different. That is if you are using a PC, don't think you specified.