If you want to clean print spooler in windows xp easy option is using cleanspl.exe tool from Windows Server 2003 Resource Kit but are applicable to Windows Vista/XP. You can be downloaded here
Cleanspl.exe: Spooler Cleaner
Spooler Cleaner (CleanSpl) is a GUI tool that restores the print spooler to its original state. It deletes all print jobs, printers, printer drivers, and spool files on a specified local or remote server.
Install win 2003 support tools in windows Vista/XP after installation go to Start—>All Programs—>Windows Resource Kit Tools—>Command Shell
Once it opens you should see similar to the following screen
Now you need to enter cleanspl.exe and press enter
Clean Spooler tool looks as follows and here you need to select computer name and click on clean spooler now you need to follow on screen instructions