<p>I am attempting to get the <a href="http://www.jetbrains.com/resharper/" rel="nofollow noreferrer">Resharper</a> test runner to recognize my MSTest unit tests via <a href="http://www.gallio.org/" rel="nofollow noreferrer">Gallio</a>.</p>

<p>I have the following installed:
VSTS 2005 8.0.50727.762
Resharper 4.1
Gallio 3.0.0.285</p>

<p>I am also running Windows XP x64.</p>

<p>The unit test options only shows NUnit as being available. I am thinking that I must have some versioning wrong. Can someone point me in the right direction? Am I barking up the wrong tree and this is only works in VS2k8? </p>

<p><strong>UPDATE:</strong> Well I updated Gallio to GallioBundle-3.0.4.385-Setup and it now shows up in the unit test options for R#. But I get the following error when running tests in either R# or Icarus:</p>

<blockquote>
  <p>Failures Cannot 
  run tests because the
  MSTest executable was not found</p>
</blockquote>

<p>Thanks </p>

I'm not sure if this applies to your question, but the latest news on the Gallio site states :
Gallio and ReSharper 4.0
A few people have asked when Gallio will
  support the final release of ReSharper
  4.0. Unfortunately there were some last-minute breaking changes between
  ReSharper 4.0 Beta and the Final
  release. So the ReSharper plugin in
  Gallio Alpha 3 Update 2 will not work
  anymore. No matter... we plan to
  release another update of Gallio later
  this week.
Update:
just saw this applied to an earlier version than you were using so disregard that.