[Zope] Join/Leave versions without management screen?

Hi there, I want to create an url for my "super" users so that they can watch the current edit versions edits so far. <a href="CurrentEditVersion/enter">Enter edit version</a> <a href="CurrentEditVersion/leave">Leave edit version</a> should work, but because it is redirected to a management screen (which I don't want the user to see.) How can I let a user log into a versioned site without redirecting to the management screen? The only extra right the user should have above the Anonymous user is join/leave versions. Thanks Etienne