clean up download directory?

[Steve Kelem]

After having used the Cygwin download program (which is FANTASTIC!), 
I've noticed that I end up with redundant copies of the software.  There 
are multiple versions of a piece of software in a directory, e.g.,

<site>/release/binutils/binutils-20050520-1.tar.bz2
<site>/release/binutils/binutils-20050608-2.tar.bz2

as well as copies from other download sites:

<site2>/release/binutils/binutils-20050608-2.tar.bz2

Is there a (semi-)automatic way to get rid of the older versions and 
keep just the latest one?

Thanks,
Steve

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