<p>Any ideas on how to disable, but not uninstall Resharper 4.x or above?</p>

You can disable ReSharper 4 and lower using the Visual Studio Add-In Manager (remove the check from check box on the left).
In ReSharper 5 and above (tested up to version 7.0.1),
this is how you can suspend
ReSharper from the Tools > Options > Resharper