here

make a trigger like this:

Event: periodic event: every 5 seconds
Conditions: player 1 slot status equal to (has left the game)
Actions: Pick every unit owned by player 1 and do (give picked unit to random player in player group (all allies of (picked player)).
Turn off this trigger (preserve trigger or whatever)

make of these triggers for each person in your game.
The preserve trigger thing is to prevent the trigger from firing every 5 seconds after a person has left.

DOH this was meant to be a reply not a new post that asked how to make a trigger that gives units to the team mates of players that drop in games.

WAAAA I can't DELETE this stupid thread I keep getting an error message. Sorry for the mispost.