Hang on. Before people start entering, I propose this amendment to the rules:

Any cover song entry is all right, as long as you host it yourself. Where you get any backing tracks is your business, as is where you host them. If you amend the rules thus, several users (myself, odalisque and a few others) have already made good suggestions for how to record it (audacity, garageband) and how to host it (internetarchive.org). Anybody object to this amendment?