RWG is defiantly not installed when I installed RTG. I ve now tried installing with both biome tweaker and Terrain control and I still get the same strange message to do with buildcraft. When I run the modpack without your mod and the prerequisites and RWG it runs fine. I ve tried installing the required Buildcraft component and I got the same message. The game seems to not be generating a proper log of the event either.
(Edit) seems RTG wanted a newer version of buildcraft. I found the correct version after a few trys. Your mod looks amazing BTW!