ive looked up solutions everywhere on the internet that i could, but so far i still cannot figure out how to fix the sideways headgear glitch when making new(modified) headgear.

Ive already tried doing the Update Char Face Model Availability thing and it does nothing. so far the variation of the glitch that ive encountered are it only affecting me, and it affecting everyone wolrd wide who wears a hat. It only affects certain head gear though (doesn't affect power helmets and the reinforced combat helmet for some reason).

If i could please get a swift and effective answer it would be greatly appreciated. I love modding fallout, but i dont want to have to turn away from modding headgear just because of this stupid glitch.

There is a http://www.thenexusforums.com/index.php?/topic/250193-converting-fo3-hats-to-nv/ at newvegasnexus about this. Perhaps that will answer your problem.