Upgrading from 5.0.4 to 5.1 is exactly the same as upgrading from 5.0.0 to 5.0.x:
https://openacs.org/doc/current/upgrade-5-0-dot.htmlHowever, even if you're not using cvs to help track your changes, ease your pain, etc, etc ... you should actually follow the instructions in the second bullet, though, not the first - You'll probably want to do what it says in item #1, "Upgrade the file system for all packages in use" all the same, but it doesn't say so in the first bullet, which otherwise would seem appropriate if you're not using cvs.
