ThereÂ's also an other way to go round the 63 limit...
I once tried this, itÂ's relly one big pain in the backside if you have a large mission which IÂ'm guessing you have. And also, you can not have the resistance on your side.
-Set the resistance to be friendly with your enemy (or on your side if you want more groups for you...)
-Then place more groups into your map and position them to where you want them. (giving them each a name comes highly recommended. Otherwise you might have some difficulties...)
-Then save the mission and exit
-Make a copy of the mission.sqm file (for the sake of Murphy...), then open the original and edit every single new (named) unit to be on the resistance side. (I believe it was side=GUER)
Save the edited mission.sqm and reload your mission in the editor. Now you should have over 63 groups on your side and no problems about prewieving the mission.
This should work with the 1.46 (if I just remember correctly...)
Just remember that after you have done this everytime you open up the sqm edited units window it returns to what it originally was...
And also, I didnÂ't test this very far, just with few additional tanks after the limit was met, so I don't know how many more groups you can add this way. I would presume though that thereÂ's a possibility for another 63 groups.
Not the user friendliest way, but give it a try if ya like...