[Help] Change dino Mesh

Hello, i have a problem making my mod.
All i want to do is change the T-rex mesh with one i have a little bit edited, is there a way to do it?
I can import my mesh as a static one, but i can’t figure out how i can change the model in the original skeletal mesh, with my one (the skeleton is the same since my mesh is basically the same as the original one)