Just use the MW database. It's a complete database and no sourcing needed. You can find it at:
http://mwnpcmovdb.myftp.org/MW055_alpha_02.zip
I used alpha_01 though. Not sure what 02 is like. Just a heads up.
My question is this - how close are Myra's and MW's in terms of what mobs are in game and what zones are done? I thought Myra's was complete (after sourcing), but I've heard no official word from any of the developers either way.