You should be just installing SP2 to begin with, so don't worry about SP1 at all. Microsoft service packs are cumulative, so everything that was in SP1 is in SP2.
Also, depending on the speed of your system, the service pack install may seem to "freeze" at some point, when in fact it's still actually working as it should, just taking awhile.
Your actions may well have just made your problems worse however. Now would really be an excellent time to back up everything you don't want to lose, then make a slipstreamed SP2 XP Install CD. After which, you format and start over, this time with a fresh system with SP2 already installed.
I installed a new motherboard and did Win XP repair process. During process it asked for Service Pack 1 cd. My XP did not come with a separate disk (probably bundled with it) so I pressed cancel. Now when I go to Windows Update I get an error message saying:
Windows Update has encountered an error and cannot display the requested page. You may find the following resources helpful in resolving the problem:
For self-help options:
Windows Update Response Center
Windows Update Troubleshooter
Windows Update Newsgroups
I separately downloaded the Service Pack for Network Installation and tried to install it that way. When the install bar is about halfway done, the process freezes at the point of "running processes after install". At this point, the mouse and everything else worked. I uses control-alt-delete to end the task. I thought it might have been a random thing so I tried the whole process again but with the same result. Any suggestions on how to proceed without having to do a clean install of XP from scratch? I also uninstalled Service Pack 2 using the Add/Remove Programs in the Control Panel.