Under the settings for "Build", the option "site structure(default)" puts the
following files in separate directories as dictated by the 4 digit number in
the site structure:

<http://mysite.co.uk/UmbracoCMS/media/4003/example1.pdf>
<http://mysite.co.uk/UmbracoCMS/media/4008/example2.gif>
<http://mysite.co.uk/UmbracoCMS/media/4015/example3.zip>

Is it possible to define a structure to ignore the sub directories (the 4
digit folder name ) in "Media" so that all files  are downloaded to the media
directory as follows:

.../media/example1.pdf
.../media/example2.gif
.../media/example2.zip

I only want this to apply to files in the media directory, the rest of the
site should remain as is structured.