Problem with SP2 Integration, and also errors

[kaleidoscope]

Hi, I'm trying to integrate SP2 into a very old SP1 cd, but everytime I download the SP2 and try to integrate it, it gives me an error on a random file (when it's checking it's integrity, I guess). Also, when trying to simply use a SP2 cd and then using one of the addon packs to get my system up to date, it keeps freezing on Updating shell32.dll or updating mrt.exe, and it just stays there for hours, it wasn't like this before, I don't understand what's going on. Have tried downlodaing the SP2 and update packs multiple times, same results. Also tried installing and reinstalling nLite