RFC and RFC modmods are scenarios, you don't start them with play now.
Most likely you installed the mods in the wrong place / to a wrong subfolder - a common mistake is to unzip something into a subfolder instead of unzipping it directly to your BTS Mods folder.
Go to your BTS mods folder, then to the RFCC/DOC mod folder. There should be PublicMaps folder there and all scenarios are inside. They can be launched by double-clicking too. If you have one folder too many (e.g. RFCC/RFCC) then it's wrong.