drpepper....you say that your DVR is in the closet and you do not use the remote to change features or channels....mmm, this could be tricky. I'm not sure what an existing automation system is or how it functions. You can download the setup manuals for each DVR and see if the setup codes are what you are looking for. When you get a new box, I'm not sure if the old remote will work on it either, but since you don't use the remote....??
For the past few days, there has been a contour1 vs contour2 discussion in the forum. Also, search the forums for answers, or contact COX.