How do I load units automatically into an overlord? If it's just like, Run AI script, then cool.
If not, please help, I can't get it to work.

I believe it's Run AI Script at Location. "Enter Transport" or something like that.

thanks roy, i'll try it

You might get problems where they enter the overlord, then automatically exit out, this is because computer players' AIs are set up so they don't leave units in idle dropships, you can, however, use a neutral player instead.