Why would anyone want to use Windows 2008 R2 Server as a workstation? The main arguments in my case are the superior firewall and user account control. Now, if you want to do the same, you can go to win2008r2workstation.com and get a really detailed howto with screenshots - or you can read this post for a really short checklist, something I prefer to have for future installs of the same variety. Do you want to know more?