Big asymmetrical kart template help

[Honestyi]

I was trying to make an asymmetrical character but the problem is that i needed to do it using the big template due to the kart's size, and so i thought:
maybe i can make 2 separate wads with the diferent sides and mash them together using the flip in the properties as guideline, but when i copy paste from one another, the game doesn't recognize it and it just crashes my game when i load it.
So... is there a way to do it without having to manually make all the sprites one by one using slade, or a guide on how to edit the template's codes to read it, or even a big asymmetrical template? ty for the help in advance

 

[Evil Sonic]

Hello! I'm pretty late to this post so I don't know if you still need this: but I also needed a working big asymmetrical properties file so I made one myself.
Hopefully this helps you and anyone else reading.

 

[Honestyi]

no you're not late, in fact, your timing was impeccable, i was gathering courage to do one myself when you responded, so thank you very much ^^