I did it, I did it !!!!!
I used an amazing combination and versions of conversion tools and finally I get a superb BGL file! The half ship is now floating in the Chicago bay !!!!! And look at those FPS rates! Superb !!!!! I am so excited !!!

This is my first scenery object.

About the FPS, my specs: AMD Athlon 2000, 512 MB RAM, Leadtek GeForce-FX 5700@128 MB.
THE TRICK THAT FINALLY WORKED:
I used the FS2004 version FSModelExp.dle to get a good conversion, while used MDLCommander in the background to get it in X file format. Then compiled it to BGL with the FS2002 version of MakeMDL and it worked !!!!!