XP does have msconfig, but it can be an annoying thing (i think i never use it right, it always ends up popping up everytime I reboot). Learn to edit your startup process like a real geek: Use the Registry (warning, backing up the registry is always a good idea before making changes).
start->run->type "regedit" hit enter
go to Hot Key Current User -> Software->Microsoft->Windows->Current Version->Run
and Hot Key Local machine -> Software->Microsoft->Windows->Current Version->Run
if you don't find your process file there, then it might be invoked by a service. I like to have my administrative tools accessible through the system tray, so right click on your start menu, select properties, go to customize, and make sure "Display Administrative Tools" is checked. DO NOT TURN OFF ANYTHING YOU DON'T KNOW YOU DON'T NEED.
is your friend for what you do and do not need.
good luck