I doubt Fitzpatrick and Cross had to venture through the fireball room - I seem to remember from the novel, however, a logical reason why separate routes to the ship were chosen - Tex just happened to be lucky enough to have a temple stuck between him and the ship...
Bests, Rockefeller
P.S. If I remember correctly, the eagles came to the rescue in the nick of time and kicked some wraithasaur ass - I'm sure that brave eagle wouldn't mind being accompanied by an entourage of three-or-so other eagles. Besides, the eagles would have to plan a sneak attack and fly high above the clouds (did you see the wingspan on those things), thus completely bypassing the wraithasaurs unnoticed until it was most likely too late to do anything
~That seems more plausible to succeed than two starving hobbits on foot walking through the land of doom and up a mountain unnoticed...but that's just me 
Bests, Rockefeller
P.S. If I remember correctly, the eagles came to the rescue in the nick of time and kicked some wraithasaur ass - I'm sure that brave eagle wouldn't mind being accompanied by an entourage of three-or-so other eagles. Besides, the eagles would have to plan a sneak attack and fly high above the clouds (did you see the wingspan on those things), thus completely bypassing the wraithasaurs unnoticed until it was most likely too late to do anything
~That seems more plausible to succeed than two starving hobbits on foot walking through the land of doom and up a mountain unnoticed...but that's just me "Twenty years from now, you will be more disappointed by the things you didn't do than by the ones you did do"
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"ERROR: Error Code Does Not Indicate An Error"