I'm trying to find out if the Harmony remotes will work on 3 DCX-3200 Motorola cable boxes stacked on top of each other. I'm looking to do this on the low cost end for a small business but not sure what I'd need or if it will work. Anyone have experience with this?

If you are trying to control each box independently, then it will not work. The only thing you could do (and this depends upon the model of your Harmony remote) is:

1) Leave one box running on IR (regular set up)

2) Connect an RF hub with individual "blasters" to each of the other two boxes, and

3) Assign a distinct "address" to each of the two RF signal set up boxes.

Again, your Harmony remote must be able to send RF signals, as well as IR.