- Duplicate install folder
- Then, from windows start run "regedit" command to access the registry editor.
Lookup and duplicate the registry keys from selected install at "HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microprose\Star Trek: ...".
Adjust the InstallPath but for next step keep care to not lengthen the new registry key name.
The registry keys actually are split to "Microprose" and "Microsoft\DirectPlay\Applications" folders, but duplicating the Microprose ones from my testing seems to be sufficient. - with a hex editor edit trek.exe registry keys at 0x00174357 and 0x0017b09f
- change the trek.exe window name at 0x00188c47 so it is unique
- edit the stbof.ini application path
- and in my case, for the second run I had to enable window 8 compatibility mode
( also refer viewtopic.php?p=58950#p58950 )
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Analysing issues of the corrupted UDM3 MP save game, I noticed that I can't run multiple game instances at same time of same mod, even when copied to another folder with adjusted ini. From what I found DxWnd has an option to allow run multiple instances, trek.exe itself however must have a check to prevent this. For hotseat and testing I think it would be great to disable that check.
Since mpr++ already allows to run multiple instances, I must have disabled it there too, so it should be easy to find. I can have a look what check it is you need to nop.