Hey Mario,
The changes I made to Giles this morning in the AppDomains branch removed the need for the ProjectRoot parameter all together, so I deleted it. Giles was only using this parameter as a location to start searching from while looking for the command line runners for each test framework. Since the AppDomains branch doesn't use the command line runners, the parameter became unnecessary. :D A little more clean up, and putting in an NUnit runner, and them I'm going to merge the AppDomains branch with the master.
Jeff