Change the unit summoned in a custom spell

Im using the Reskull spell editor... I want to make a spell like Feral Spirit, but instead of wolf summoning it summones something else.... it asks me for a "Summoned Unit Code" how do i know or where do i find the unit codes??

Help ME:...:

Create a new trigger that creates the unit you want to use to summon, convert the trigger to Custom Text, and look for a 4 digit code inside of there, usually it will start with 2 letters and end with 2 numbers.

THX :D

if its a unit that isnt custom, you can find a list of all the tags in unitdata.slk extracted from war3.mpq

and, if you want to summon a custom unit, and you don't know it's ID tag, make a 'dummy' trigger with the actions 'create unit', have it create your cumstom unit, then convert the trigger to custom text, and instead of listing the unit under what name it shows up under in the WE, it'll come up as it's unit ID tag.

This works for EVERY unit you create too btw, not just customs.