Stumbled on Source Control

Installing all the software I need in my new Operating System, I’ve stumbled across my first real problem, (had various other small ones, which didn’t worth mentioning) Source Control. VSS 2005 does not install on Vista. I get a software requirement error, stating that Windows XP SP2 is needed in order to complete the installation. So if someone plans on checking out code from office and work at home with it in his Vista enabled laptop, he better forget about it, or use another source control system L. I wonder if there is any work around I could use…
I’m curious what source control Microsoft’s engineers/developers use for their code if  VSS does not work with vista?