If necessary, you can use the System Restore feature of Windows XP. To start it, clck on Start-All Programs-Accessories-System Tools-System Restore. When the SR program window loads, choose "Restore my computer to an earlier time", then choose a date prior to the installation of the Service Pack.
Hope this helps.
If the SP2 has already been downloaded and since I am not as well versed in solving potential problems should I run into any, how can I remove the download completely until a later time? (I'd feel better since I've seen several posts where the user has run into problems and has had to uninstall). Thank you!