Problem Installing Windows CE 6 Platform Builder SP1

While installing Windows CE 6 Platform Builder, I ran into a problem. When I tried to install the SP1, it gave an error saying that I need to have CS 2005, VS 2005 SP1 and Windows CE6 installed. This seemed kind of funny as I had already all three installed. Googling led me to a thread where someone mentioned that installing Windows CE 6, breaks something in the VS 2005 SP1 and reinstalling SP1 should fix it. Tried that and after an agonizing 30 minutes, when I ran the PB SP1 again, no more error message.