Gibson Man,
The best way to run Conventional engines via command control is to invest the DCS TIU & HHRC. Along with a Z4K Transformer and side receiver. Your Conventional engines will run better than you can ever imagine in this control manner. Barry has the entire usage explanation written out in his DCS O Gauge Companion book. I run both Conventional Engines and DCS P2/P3 Engines at the same time, with the DCS HHRC, sometimes even on the same Track.
Have fun.
PCRR/Dave