As proprosed at the Minkata meeting and detailed on the OU forum, this is a demonstration of "minimum of fuss" way to update OU/Cyan Uru clients to a H'uru build. To begin, you will need a clean, up-to-date installation of MOULa. I recommend making a new copy of URU for testing purposes.
Unfortunately, due to the server encryption found on MOULa, you will need to download a new copy of UruLauncher.exe that has been built to connect to the testing server. This launcher build tracks what I believe to be the current copy of Minkata's UruLauncher.exe (HG changeset [748170b85220]). The only change is to the the gatekeepersrv keys. I have included a copy of the server keys in this gist if you want to build your own. The server IP is 155.254.30.62.
Once you have downloaded and replaced UruLauncher.exe, you may begin by running UruLauncher.exe.