The first pic shows a truck with slider pick-up shoes. This truck was harvested from a junker #293 steamer. Otherwise, the sliders are available as repro items and if you have a truck with a post, or mount a post on a truck (I have done it, so it's possible), then you are in business. Notice that I have also soldered a wire from the pick-up and taken it inside the tender to the other pick-up wires. It probably is not needed, but I figure that everything I can do is a help.
This second pic shows diesel shoe boxes cemented in the truck. To make an even more solid connection, I thinned the metal tabs down a little on the shoe boxes and drilled very small holes through the sheet-metal truck side frames. Then I inserted the tabs through the holes and bent them over. A dab of flat black paint makes them virtually invisible. Next up will be to solder a wire from the shoe box to the inside of the tender. Note that these diesel shoe boxes will not fit into the knuckle truck sintered side frames.
02/08/2011: Just finishing up on the accessories, etc. I installed a semaphore in case I want to run two trains. I'm currently using two pressure track trips and it seems to be working reliably. I figure that any vintage animation or illumination that I can add is a good thing to add interest - as long as it isn't too expensive. I believe that I have that Semaphore located in a good position. I think I will be able to stop a given train anywhere on the layout to do something and not have to worry about a collision. I'll have to experiment with parking a train at various places to see what happens. Hopefully, the other train will always get stuck at the Semaphore until I release the held train and it finds it's way to the Semaphore release trip. I wired the Semaphore base post wire through an on/off switch so I can turn it off if I only want to run one train. Anytime I wire up something to get activated with a track trip, I also wire it through an on/off switch so I can stop the madness whenever I want. lol