How can I fake the XP service pack level to an installation program?

My machine has XP service pack 3. The software I am installing expects SP2. Is it possible to lie to the installation routine to get it to continue?

2009-02-18T07:58:04Z

Yes, I know it's crap. I still have to get it installed.

Anonymous2009-02-18T07:34:23Z

Favorite Answer

SP3 is backwards compatible. If the software refuses to install, it's crap.