As promised, here's the plugin I was talking about and the Rhino Mocks templates.
Rhino Mocks Templates - Import these in your Template config.
Plugin - Drop this in your "%PROGRAMFILES%\Developer Express Inc\DXCore for Visual Studio .NET\2.0\Bin\Plugins" Oh, and yeah I know it's named after only one of the commands in there, but I was too lazy after I added the other commands to rename the project. You'll see the new commands in the Template configuration in the Command dropdown.
Plugin Source - I know, not the source you want from us right now and it's pretty ugly, but it's a start, right?