I want to use Qt 4.5.0 together with Visual Studio 2008. I downloaded the Library which was precompiled with Mingw. I deleted the allready compiled binaries and recompiled the library and tools with VS 2008 Express. This worked fine.

Then I saw that there is a free Visual Studio plugin. I thought that I have to create a complicated build Enviroment using CMake to get Qt work with Visual Studio before i realised that there is this plugin

But when I want to install it say "No Qt package found....blablabla". I am able to continue but I can't check the Add-in during the Installation process.

So:
Where is the installer looking for the Qt Installation? Is there some sort of Enviroment variable I have to set?