How can i swap engines?

i want to put an etk i inline 6 in a 200bx. how can i put an inline 6 in 200bx? i tried it but there is no engine model

 

did you make a copy of the .dae file in your 200BX folder?

if you did, is the flexbodies section of the engine.jbeam still referring to "etki_engine"?

 

Nvm i figured out it on my own