Making new pets

[KhaN]

Im actually making spells, and i was wondering if it is possible to make new pets.

First i tried to forceload a wisp model and then maked a spell that will summon a pet and then, with target illusion will change the model to wisp. My only result was a basic human model *sigh*. After a PM to Mongrel and 2 days searching to what the commands to make spells in spell_us.txt could refer, it come in my mind that it could be a command in EQEmu source (Yes, im slow to think~), i have found something in spell.cpp, it look like the commands to make pets are here.
At this moment, i dont have the knowledge to make new pets and its not the priority in my project, but i would just like to know if its possible ? Like edit source to make a new wisp pet ?

Thanks