i know in 2008 you can do this easily. but im using 2006

i need to change colors of an object in one vp and have it show a different color in the other vp. w/o using an xref

example
normal floor plan and an all gray background plan.

i dont want to duplicate the plan. because many people will be handeling it and if the plan is modified i don't want to worry about the other plan not being current.

any ideas