Ray and Skelux: Any problems seem to be caused by the collision type - blank's script tries to guess which type to use based on shared textures (though this isn't perfect either) whereas in the editor I just set them all to zero. Unfortunately yous'll have to manually edit the .kcl collision file using the KCL Editor. Alternately if your model has perfect collision (test it thoroughly to check) with a revision older than rev. 23, you can stick to using that for your collision.
jdpgamer: Here's a tutorial:
Scroll down to "Check out a Solution from Subversion". You'll need at least Visual Studio 2008, the Express edition'll do and is free and AnkhSVN (or another plugin but this one's good).