I finally got XP SP2 to AU, but I am on Dial-up! Ack

So far 46% has downloaded in about 9 hours. (I want to switch to DSL, but that''l have to wait till this is over.)
Does anyone know if it's safe to continue to download at the rate of 2% an hour? I have a great machine, it's the dial-up and the Microsoft AU load!
Also, does anyone know if you can delete a download of SP2 and where to find out how to do it. I EM'd Microsoft and they pretty much say understand their server slowness
Thanks. I like computers, but I'm not a techie brain!