If your short on disk space you can reclaim 800MB by un-installing the files used to install SP1. If you right-click on command prompt (found in the start menu) and choose 'run as administrator', then type 'vsp1cln' (without the quotes). Hit enter and the files will un-install. The thing to remember though is once this is done SP1 cannot be un-installed...
More info' here:
VSP1CLN Command-Line Options
More info' here:
VSP1CLN Command-Line Options
