I've tried Logmen but suffered too many communication conflicts.
I completed revamped my approach and now use a combination of Autohotkey, Windows Task Scheduler & MSExcel macros.
I can go away for a week and every morning MFP7 runs, interfacing with a spreadsheet of selections on MSExcel. Then at night MFP6 runs my UK systems, again interfacing with MSExcel. I put a PC re-start in between just in case one venue crashes.
Task Scheduler controls the timings.