They did this in lets see, I think all of the Phantasy Star games, um they did this in Tabula Rossa (not sure if thats how its spelled), um... Playstation Home does this (discretely)... if it wasn't so early in the morning and I wasn't so tired i might be able to come up with a dozen or so more, there are advantages and disadvantages to this method. But it would still require more hardware be installed, there's really just no way around that.