What are you waiting for? Just post that trigger here and we will try to help you. Though It hink I know what you mean... Create the GameCache and save it into a file. Then you can add units to that Game Cache by giving them a cattegory and a label. In this way you can find them... Be careful though. Use the same label/cattegory in all the maps.
Use EZ save/load Code 3. That will save 3 characters using a character code such as R0HDKSIORY. The problem with Game Cache is that it doesn't work with multiplayer (using saving features won't anyway). You can find this in the map section. Do a search for Save/Load, and it will pop right up.