If you are trying to run a .vsi file and have both VS 2005 and VS 2008 you may encounter an error that indicated the file microsoft.wizardframework could not be loaded:

could not load file or assembly 'microsoft.wizardframework

Below are the steps I followed to correct:

1. Check the GAC (C:\WINDOWS\assembly) for the assembly Microsoft.WizardFramework.dll
2. If it does not exist, check that it exists in C:\Program Files\Micro
   soft Visual Studio 9.0\Common7\IDE\
3. If it does, then open a VS command prompt and add the dll to the GAC
   gacutil /i "C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\Microsoft.WizardFramework.dll"
4. Check for the dll in C:\WINDOWS\assembly
5. You should now be able to run the VSI