My hard drive just died, and I removed the screws and slid it out. It looks like I just slide in a new one and reinstall Windows. Is that all there is to it, or are there some tricks I need to know? It's 80 GB, and I'd like to increase that, so is it OK to put in a 100GB drive? It's a Hewlett-Packard model ZE5385, if that matters. Thanks...