What is the best way to eliminate room hum in my video?

I have a room hum in my clips that I wish to eliminate.
I downloaded Audacity and it worked fine, right up to the point where I exported it to FCE. In Timeline the sound file was out of sync and nothing I have tried will synchronize it with the video. I understand that going through the Audacity cleansing has removed the FCE signals that would have normally produced the out-sync- buttons in the Timeline so that I could rectify the problem.
I posed this problem in a previous post and crowed that I had solved the problem. Turns out, I had not, so here I am, with my tail between my legs, looking for assistance.
1) Does anyone know of a way for me to export an audio clip from Audacity so that it is correctly reunited with its video in FCE?
2) Is there a way to move an audio track one frame at a time along the Timeline track so that I can try to align they clips by trial and error? (I know; this sounds very sloppy)
3) I have been reading with great interest the post by Tricial and her problems with Soundsoap. I was just about to give up on Audacity and then download Soundsoap trial software. Tricial feels, she states, that Soundsoap and FCE are not compatible. One respondent to her post sensibly suggested she contact Bias, the parent of Soundsoap, and ask if their product is compatible with FCE or not. An excellent suggestion. I went to the Bias site and found that in order to ask a question, you must provide a serial number! In other words, you must buy the product before you can ask if it works! I turned to their FAQ page, but this question is not addressed. The closest they come is to saying that Soundsoap works with Snow Leopard but for all I know, that may be only in iTunes or Garage Band.
I so messed up (not exactly the word I was thinking) my sound tracks that I have decided to start over and dump a couple of weeks work. Aargh.
I would appreciate your wisdom.

2) Is there a way to move an audio track one frame at a time along the Timeline >track so that I can try to align they clips by trial and error? (I know; this >sounds very sloppy)
Lock your video track, select the audio, type +01 then Enter.
A Move box will appear with the value 01 init, this means the audio will move forward one frame.
Type -01 to go backwards. Typing -02 is two frames etc.
Make sure there is nothing in the way or you will have a +Clip Collision+ warning.
Can't help with Audacity.
Al

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