I am trying to key move some commands to a Comcast remote. I just purchased a Marantz SR6006 receiver and would like to be able to assign the BD input to a key on the Comcast remote. On other threads I found the EFCs for power and volume, but I cannot locate the input EFCs. Marantz provides a spreadsheet of all the "discrete" IR codes, but there is no column identifying EFCs. Is there a way to find a listing of all the EFCs? The spreadsheet has the remote codes in RC-5/RC-5 ex. format and hex codes. Is there anyway to discern the ECF from those codes?