It turns out that the CVS CSS Proxy is doing a fine job after all. I was just not usind CVS edit/unedit commands, when actually I should have. Proxy is using that by default and thus behaves in a manner similar to Visual Source Safe. Edit/Unedit is a useful feature when working in a team and that's good to know. When I keep my home projects in a CVS I might not need to use edit/unedit but simple checkout/commit and that's good to know, too. :)