Not allowed to download anything? Hmm... well, maybe you can download them to a flash drive. That way, they won't actually stay on the computer and your parents won't know about it. And then, when you want to use them, you just find them from the flash drive. ^_^ WMM might not be opening because you're not an administrator and WMM can be finicky. I'd right click it and click on the 'open as administrator' tab. It should work then, though you might need the admin's password. I wouldn't know; I have my own computer, so I never had to deal with not being the admin.
LOL, that sounds like the pits. I had this oneshot I was doing for AkuRoku day, and I've only got 3,000 words on it... still, more than a month after the day. And I don't even want to think about all the Zemyx one shots and multis that are cluttering up my documents folder.