Yes running both conventional and commend control (DCS and Legacy).
As best as I can remember (recently moved and have got my new layout set up yet - just running the ""carpet railroad). What I did was set the track voltage - using the DCS remote to either 22 volts for commend control (and then run either MTH or Lionel using the appropriate remote) or vary the voltage if running conventional.
Have you seen the attached figure (from the DCS Operator's Manual Fifth Edition page 99?