Don't get the Pro version, get the Basic(Free) version. That way if it slows down your computer too much or your have trouble connecting(there's a fair chance you will if your connecting through your uni). You can always uninstall it and and delete it and you won't be out anything.
Download it from the official site:
Lime Wire » Download LimeWire
Space is probably gonna be an issue. Your pretty low on disc space. It's probably gonna slow things down and it may not work properly. You'll have to try it and find out.