Mark,
It is not a very difficult conversion to do, the hardest part of the project is fitting it all in the GP body. ERR's instructions are quite good and if you do get stuck you can contact the folks at ERR for info, they are always willing to help, or you could contact me, I am probably more familiar with the S gauge equipment. Carl Tuveson is another good contact but I don't know if he has done the Cruise Lite with the Railsounds board. The sound board connection to the Cruise Lite is a little more involved because you have to hybrid the plugs but its not difficult. Both of these items come with clear instruction sheets. The bad news might be the cost, the Railsounds board is around $90.00 and I think the Cruise Lite is around $75.00 plus you will need a different speaker than the Fat Boy that is supplied, it is to big unless you would have a dedicated car to put it in. I found speakers at some of the electronics sellers on the internet, I would say maybe an additional $10.00 for the speaker. You are looking at about $175.00 total. That may kill the idea for some folks but I had the GP already and I am sold out on TMCC/Legacy so it had to be. When you look at buying a Command engine in S gauge you wont find much in that price range.
Ray
