Audiomastering of Videofile with varying Audiolevels

Hi everyone,

i have a 100 min video file which was assembled from various pieces of footage with varying audio levels. i do not have access to the initial pieces of footage nor the relating premiere projects but i need a quick (!) way to have all levels roughly the same so there won't be any signifficant volume changes throughout the film. think of a loooong wave file with inconsistant volume levels.
is there a tool or filter in audition which could help me on my way, maybe a compressor or some kind of "scenewise normalising"? i wouldnt want to work my way though every single scene...
i am more of a video and authoring guy, so please be gentle :-)

kind regards,
m.