How aobut this?? Edit Night, Dawn, Day and Land into one huge 8'ish hour Dead epic? I would use the 1990 version of Night due to it being in color (easier to incorporate). The films would overlap each other rather than one ending and the next starting. For example the helecopter that flies overhead at the end of Night 90 could be used to merge the scene from Dawn where they fly over the readnecks shooting the zombies.
Just a thought.
But I'm still hoping someone will do an extended Dawn.