Crocodile model porting error

I finished converting This model to nwn ee.
I used somecrocodile model from valut as base model and tried to create normal and spacular map. but when i import it to nwn it becomes mangled mess.
I might try to convert it to pure basilisk model.
Can someone tell me what couses this?

PS: Download

Fixed the mess error but now toolset crashes when i use it on creature.
Fixed it by removing some heights from bone body.