you need to install windows using a different Serial Number, then it will allow you to install service pack 1 or 2.
There is a way to change the serial number without formatting and reinstalling, but it's a bit complecated and i can't remember where to find it.
If you require a working serial number, PM me.......
oh and btw why are you bothing with network applications when windows has it's own network setup wizard that works perfectly well.