Just bought one off Craigslist to use as a web server. Few questions: 1) Is there an easy (and reversible) way to make the front USB port power-only (not data)? I want to charge my iPod, PSP, etc with it without disrupting the server 2) Is there a way to replace the optical drive with a third hard drive? 3) I noticed when you open it, there is a clear piece of plastic, are you supposed to keep that or is it packaging? 4) I have cats that shed a lot and I fear cat hair will find its way inside the holes in the front. Do those holes take air in or blow it out? Thanks!!