Solved: No Product Key When Installing Visual Studio 2005 Over a Trial Version

I was upgrading one of my virtual machines from Visual Studio 2005 trial edition to the full pukka version of VS 2005 Professional from the MSDN subscription. I run the installer, it goes to work and even detects that the trial version is installed and prompts me to upgrade. ‘Great’, I thought, ‘Microsoft has it’s [...]