I have Visual Studio 2010 /SP1 / MVC 3 (With April Tools Update) installed on a machine with a fresh install of Windows 7 64-bit Professional.
I do not have resharp
You probably have already tried that one, but for me the steps in this blog-post worked: http://blogs.msdn.com/b/webdevtools/archive/2011/03/24/razor-tooling-for-mvc3-rc-with-visual-studio-2010-sp1-rtm.aspx