Test All Tests in TFS Build Server?

I have multiple (VS not nUnit) unit tests that I would like to run after-build on my TFS 2008 box. I don't want to use the .testrunconfig file or .vsmdi file because they have a few problems in my multi-developer setup. I would like for the build server to do some inspection of every test*.dll file in my 'drop directory' and run any tests it finds there. the tests are database (gdrv2) tests and regular unit tests also.
 
There seem to be plenty of resources and hacks and etc for 2005, but they involve changing things or doing things that don't apply to the 2008 product. Can anyone throw me their $.02 on this one?
 
Thanks.