Jack,
Anything you connect to the DR5000 can be exported via the USB to any PC program.? Therefore, if you have the DR4088RB (XpressNet) and any LocoNet device connected to the DR5000 they will all work at the same time.? You will just need to adjust your turnouts or sensors in your PC program to match the LocoNet or XpressNet messages.? Whichever one you choose.? I prefer LocoNet.??
You will want to also connect the DR5033 with a LocoNet cable to the LocoNet "B", not the BP bus.? The PB bus is for Roco Boosters.??
Also make sure your device ID's don't overlap each other in number or the number of the outputs.? You need to count up the outputs and then start the next board at a number past the last output number.??
Ryan
Iron Planet Hobbies