The problem you have here is that the MX1500 is not link compatible. Unfortunately you have another problem in that the MX4002 is a link room set and is designed to be used with a bigger set in the main room - an Avant or an MX7000/8000 would be such sets.
What you need is something like an MX7000 and this can be your main room set which you would connect via both Master link and a RF aerial connection to the 4002. The video devices would attach to the MX7000 and you could then control them in the link room.
Sorry not to be very helpful.