I had lots of difficulty with this and just got it to work so here's exactly what I did.
Changed the ini file, had to modify swkotor2.ini as well, there is a flag along the lines of "uselocalcontent=0"
I changed it to 1...it's easy enough to find in swkotor2
cleared E:Cache file,
deleted everything from X, Y, Z
then i loaded my saved game,
moved T3 to directly infront of the computer terminal,
unequipped everything he had,
played the trailer straight through without ending it early,
loaded saved game,
and it worked...I feel like I'm going nuts as this seemed like a shot in the dark, so if this should not work for someone try lighting candles and incense and pray for the lords of the sith to bless your game