Emu XL-7 & MP-7 User's Group

My question:

I almost never end up using my collection of sysX editors because i can't get them running at the same time.  I don't know how to do the "handshake" IN-Out  OUT-In   connection with multiple hardware devices (i.e. i would like to use my E$-XT ultra, my XL-7, and my Micron simultaneously with their respective editors running.) Is this something I can solve in mIdi-Ox, Bome's  etc...?  
Much thanks I've been plugging away with MIDI for some years now, and I understand patching together some hardware and setting modes and channels, but SysX and the computer etc is a bit beyond me yet.

thanks.