Thank you very much ! It's working great for me. I can run BC 3.1.5 + IC2 1.90 + RC 4.3.0 + Craftguide 1.4.4 :).
Thanks a lot, you made my day
Edit : I may have posted too early. RailCraft is crashing the game by a nice "Saving chunk" screen each time I open my inventory or the chest where I keep RC stuff. Too bad . A third of my world is based on RC ...
Any idea to get the thing working ?