Matthew - I'll try to help though I know little of what the actual
source you're listening to sounds like. There are two basic ways to
clean up the audio (and Sound Forge is certainly useable for this
too) - one is using the Noise Reduction plugin and the other is to
find clean bits of clean "room tone" to paste in areas which have
noises you want to eliminate. Obviously, in that case those noise
have to be in the clear. If you want to use noise reduction (and 2.0
is indespensible), you need to capture a "noise print" of what you
want to eliminate. For example - if you have air conditioning rumble
in your audio track that is consistent throughout, take a 1-3 second
piece (or however much you can find that's unobstructed by other
noise - i.e. a "pure" sample of the noise) and click on the Capture
Noise Print in the Noise Reduction program to sample the noise. Then,
once you have that noise print you can begin to reduce the noise over
the whole track. The NR program samples the frequency content of the
noise and essentially removes only that from the spectrum. Play with
the different Modes and bias settings to obtain the best results.

Good luck.

Matthew Leeman wrote:
>>I am a beginner at Audio Editing, and am mainly into Video
>>Production, but the quality of some video footage we have
>>isn't 'clear' and so we wanted to rid background noises etc.
>>We were told that Vegas Pro is the program for this and so
>>we purchased it - but can't find anyway of getting rid of
>>the noises still.
>>
>>I have also D'Loaded a Demo Version of 'Noise Reduction' but
>>it is reducing the noise on the whole of my track, instead
>>of just the B.G noise. (Noises are engine motors, animals
>>etc. )
>>
>>Could anyone please led some advice to an amature sound
>>editor and help me out? I would be forever grateful!!
>>
>>Regards,
>>
>>Matt