some special instructions needed for a few specific tasks please....

Some time back, I downloaded a couple of trials of the latest and prior latest additions of Audition in the event I might need something more robust than my standard audio editor of choice, Audacity.  I had used Audition in the past from a friend's computer, so I knew it had better capabilities than Audacity for several things, plus I have issues with frequent crashes/ freezing with Audacity.  Anyway, being limited to a 7 day trial, I hope to be able to finish up a job I started yesterday in short order.  Please note, and this is important, that I want to apply the following edits to a one hour audio file recorded off of a public radio broadcast.  It is a one shot recording... nothing can be rerecorded in any capacity, but there are some very specific edits that I need to be able to do that I believe is beyond Audacity.  Here is what I need to do:

1)  The background hiss varies throughout the file since the radio carrier wave became stronger and also faded at times.  At some point, I am going to be able to replace certain very noisy sections with sections with quieter background, but I'd like to first apply noise reduction to the entire one hour file.  Brief testing seems to show that adaptive noise reduction is my best choice.  I am using the "light" setting and I am keeping a very slight amount of noise remaining in the quieter backgrounds.  I welcome your suggestions here: is the adaptive one best for the task? 

2)  There is a five second beat that occurs within every minute throughout the entire file (every 50 seconds).  I would like to replace part of this beat from a "good" section by copying it, and then pasting it over the existing beats throughout the entire song.  This will mean multiple duplicating 60 times and pasting over the same existing sections with the quieter beat.  I would also need an auto crossfade applied at both sides of the clip for each of the sixty clips.  How would I go about this? 

3)  Finally, there is a beat every second that occurs throughout the entire song.  In between the beats, there is one second of background silence/ noise.  I have been thinking of applying gain reduction with crossfade to each of the background second sections, but this would mean another setting up of an action on one section, and then applying that every other second over the entire hour.  That's a lot of gain reduction!  Chances are, I will probably just stick with the adaptive reduction as indicated above, but I'm wondering if what I want to do here is possible as well? 

Thanks in advance for any help.  There is so much about Audition that I find it tough to narrow down specifics especially regarding what I am seeking. 

Jon