Try TRX manager (www.trx-manager.com
). This program handles most of the ICOM commands including the data mode for the PRO II (most other do not handle well).
You will need an interface for the Icom CI-V interface. There are numerous cable/converters available or the ICOM CT-17.
I use TRX manager with a 756 PRO and 756 PRO II with PSK-31 and satellite modes (automatic doppler correction when using several programs like Satscape).
Do have 2 different CI-V interfaces if you expect to control 2 different PROs...