I have a night to day sequence that I shot to capture the Milky Way rising.  There is no flicker and I kept the camera settings the same to naturally allow the scene to blow out as the sun came up.  When I bring the sequence into lrtl it raises the exposure to compensate and I don't want that.  What I want to be able to do is bring the sequence into lrtl, assign and manipulate the keyframes and then have lrtl autotransition from there.  Is there a way to skip the first step where it calculates for you or do I need another approach?  
Thanks, Joe