Is it possible to have two of the same character addons be present in SRB2?

[Superstar Mario Trio]

I am trying to do some personal editing of some character mods because I want to have some models that are intended for a single character both be present in the game. I've heard some stuff about duplicating the addons and renaming the sprite lumps, but I'm not 100% sure if it works or not. One of the addons that I'm trying to edit for myself as an example is the Super Mario Bros. addon so I can have two separate versions of Luigi so the models of Luigi and Princess Peach from Kaldrum's 3D Models can function as separate characters.

 

[Arctic]

From my experience, no, this is not possible, but can use the BuddyEX mod that allows you to play as different characters and even the same.
Go into console when mod is activated and type: addbot [characternamewithnospaces] [color] (adding color is not needed though)
In order to add more bots, type: buddy_limit [placenumberhere]
If you do somehow find a way, I would not recommend releasing it to the public in any way or form, It might get rejected.

I hope this helps