Is it maybe possible to assign all HAL controlled units on mission start a specific variable to identify HAL controlled units and then basing it on that variable rather than side?
Could then even be used for multiple leaders and it even allows you to have a way to dynamically add someone to that leaders "army". Considering I'm not sat with the scripting right now I wouldn't know for sure but it's just a thought I had.

Thanks for this mod it's rather handy ^_^