I am glad that it is working for you. I just fixed my friends xbox that had RROD.
If you have any more problems I used these instructions to fix my friends xbox
http://www.4shared.com/file/186945203/c771832/XBOX_360_Repair.html
I didn't clean up the .obj file but I did unfold it and smooth it in pepakura. I hope this helps.
http://www.4shared.com/file/137326219/32caaea7/Elite_Combine_Helmet.html
Here is the link to the Halo 3 machine gun turret i unfolded a while back. I hope this helps.
http://www.4shared.com/file/67723722/fe356c61/Machine_Gun_Turret.html
Your Welcome.
I think I know why the obj file might not have opened for you. Right after I finished the unfold I downloaded the newer version 3.0.6 pep designer and now I can't open it either. I unfolded it using version 3.0.3.
I uses the ref pics earlier in the thread. It looked like the pack went from the middle of his neck to his lower back. I am almost 6 ft tall and that distance on me was about 18 inches.
Here is the unfold. It is Scaled to be 18 in tall.
http://www.4shared.com/file/121087680/463f3d58/odstBACKPACKSMBunfold.html
Awesome piece of work Th3 FETT MAN.
Here is the pep designer 2 Version.
http://www.4shared.com/file/121089410/74a6254c/odstBACKPACKSMBunfoldpep2.html
I don't remember where I downloaded this but I have a full hunter 3DS file.
http://www.4shared.com/file/92573168/70312fb9/Hunter.html
I hope this helps.
[attachment=8317:Hunter.bmp]