Finlay, I found some time to convert GPdotNET on Visual Studio 2010 solution, and make beta release with .NET 4.0 Client Profile. The new version is the same as previous, and you no longer need ParallelFX CTP for running GPdotNET.
For running GPdotNETv0.9 you need to install only:
- .NET 4.0 Client Profile, which you can download freely at Microsoft web site
Just go to http://gpdotnet.codeplex.com and download the new version.
P.S: The next version of GPdotNET is still in development processes so be patient.