There are few files that you have to port or alter, few lines remove, also breeds have different paths, names, further vision definitions differ etc...
You can look at my russian campaign conversion as example
http://www.moddb.com/members/djsatan...-assault-squad
Just disregard the improved skins as thats not stock mowas part.
Its not simple as 1 2 3 mainly due to some differences and stuff removed but with some work it can be done nicely.