R – Using ReSharper Test Runner to run MSTest Unit Tests

galliomstestresharperunit testingvisual-studio-2008

I need to use the ReSharper Unit Test Runner to run my MSTest Unit Tests on VS 2008. I have heard of using "Gallio" to do this but I don't know what Gallio is (it seemed like some all purpose VS extensibility framework). Does anyone know the best way to run MSTest Unit Tests using ReSharper Test Runner?