I'll get it over with right now, I KNOW I HAVE TOO MANY MODS INSTALLED. I also am definitely sure one of them is causing the problem. I have New Sand People Disguises, Yavin IV, Four Force Powers, K1 Force Pack, Super Skip Taris, and BoS: SR all installed.
I started a new game, skipped Taris, played Dantooine, went straight to Yavin IV and finished that entire level before returning to the game. I used Canderous and Mission, and then Canderous and Bastilla until I reached Tatooine. My first glitch appeared when random Yain IV crystals started appearing in my sabers, impossible to remove (but possible to change). The second is black bodies with the Floating Lightsabres power when I'm outside, but that seems to be related to my graphics card. When I reached Tatooine, however, Carth Onasi had disappeared from the list and clicking on his portrait-less space rendered, where his picture should be, "Broken, I'm so very broken" or something of the sort. Trying to put him in your party crashes the game. Upon buying HK-47, the same thing occurred (to HK).
Is there any KSE way to check on what's happening or do I have to reinstall? I'm suspicious that Yavin IV + BoS did it to me.
A couple of updates, Carth is not on the Ebon Hawk at all either. Also, here is a picture of my party loadout: http://g.imagehost.org/0504/missing_carth.jpg