I love this mod, but I've only ever managed to visit the Temple once per game. By this, I mean from T3 saving the Ebon Hawk to the final confrontation with everyone's favorite compulsive habitual liar of a Sith Lord, Kreia.
It doesn't seem to make a difference if I'm playing a fresh install or not, or if it has other mods.
For the record, I only ever run K2 with USM, BoS, or Darth Stoney's TSLRCM + USM as my other mods. In each case, if I ever return to the temple the game crashes when I re-enter.
(But, hey, at least I seem to get one run thru the Temple per game.)