There. I've set up a user account for myself on my mom's computer, so I'm not constantly going 'arrgh' about her settings or messing her stuff up. This will do for the next while until the new Macbook I ordered shows up. Yay for my insurance overpayment refund check! Not the method of accruing savings I would normally choose, but it works. Shiny!
Also I discovered I can hoover all my email into Gmail, which makes life about 30 zillion times easier than I thought it was going to be. Yay spam filters! which the zipcon web mail interface seems to lack. Hand culling 160 spam messages for the 3 useful ones this morning was quite irritating, but no more.