So after figuring, that the WSPBuilder is actually representing the good I fully embraced it.
To take it to the next level, I installed the Visual-Studio extensions (not only to increase the number of plugins, but this is a nice side-effect; [pluginCount++]). Unfortunately this wasn’t very cooperative to work with my german version of Visual Studio.
So after some frustration I came across an according issue and tried the proposed alternative
WSPTools.VisualStudio.VSAddIn.dll – and what should I say – it actually works!
So now I’m actually waiting for this to be merged into the release of the WSPBuilder.
(happy WSPBuilding …)