scree: http://img258.imageshack.us/my.php?image=beznzvu3iu8.jpg
not sure, i have put the helmet in (copied, not mine - craftsmod) and it works but i dont see character face.
about the materials - in my armor problem (invisible armor), i see everything corectly in brf editor. in case you dont need to write materials path somewhere into module system or so.
python:
armor:
["hussiteARMOR1", "Hussite Chainmail", [("hussiteARMOR1",0)], itp_merchandise| itp_type_body_armor |itp_covers_legs ,0, 495 , weight(17)|abundance(100)|head_armor(0)|body_armor(3

|leg_armor(6)|difficulty(7) ,imodbits_armor ],
["bohemianARMOR2","Bohemian Quarterplate", [("bohemianARMOR2",0)], itp_type_body_armor|itp_covers_legs, 0, 152,weight(15.0)|body_armor(20)|leg_armor(6),imodbits_none],
["bohemianARMOR1", "Studded Leather", [("bohemianARMOR1",0)], itp_merchandise| itp_type_body_armor |itp_covers_legs ,0, 778 , weight(20)|abundance(100)|head_armor(0)|body_armor(44)|leg_armor(15)|difficulty(7) ,imodbits_armor ],
["bavarianARMOR1", "Bavarian Quarterplate", [("bavarianARMOR1",0)], itp_type_body_armor|itp_covers_legs|itp_merchandise ,0, 593 , weight(16)|abundance(100)|head_armor(0)|body_armor(34)|leg_armor(12)|difficulty(0) ,imodbits_armor ],
helmets:
["opensallet", "Opened Sallet", [("opensallet",0)], itp_merchandise| itp_type_head_armor|
itp_covers_head,0, 760 , weight(2.75)|abundance(100)|head_armor(3

|body_armor(0)|leg_armor(0)|difficulty(10) ,imodbits_plate ],
["sallet", "Sallet", [("sallet",0)], itp_merchandise| itp_type_head_armor|
itp_covers_head,0, 760 , weight(2.75)|abundance(100)|head_armor(3

|body_armor(0)|leg_armor(0)|difficulty(10) ,imodbits_plate ],
["salletb", "Opened Sallet2", [("salletb",0)], itp_merchandise| itp_type_head_armor|
itp_covers_head,0, 760 , weight(3.00)|abundance(100)|head_armor(40)|body_armor(0)|leg_armor(0)|difficulty(10) ,imodbits_plate ],