You gotta know what you're doing when you use the editor (but it's not very hard to know how to know what the hell you're doing).
You can make troops easily enough, don't forget to set upgrades from other troops. Usually items are easy too. Just don't forget to set all of the "abilities" on the right of the item window (where it says shoot_bow, shoot_javelin, parry_up_onehanded, etc...). Parties are a pain in the keister, though. My advice is to just not make new party templates, ever.