Yep, the corrour route, there are a couple of ways to do this, MBR did it as get off train at Spean bridge cycle from there to Corriechoille Farm, then onto Lairig Leacach Bothy, then onto Creaguaineach Lodge, then Corrour Station and then took the train back.
It was featured in March 2007, and has a map included. I have a copy but its mine!! sorry! someone else might have a spare. I rode this last year and its an amazing route taking in some great scenery, also hoping to be riding this myself next week!! im leaving brum to fort bill in 3 days!!
While im up there will be taking in Laggan Woftrax, Witches Trail and Red DH at Ben Nevis, can't wait!