Applications :: Sorting Out ITunes Library - Manage Files?

Over the years, I have amassed GBs worth of music, spread over many different iTunes libraries, as a result of having desktops, laptops, replacement machines etc. When I first started my collection, I stupidly "let iTunes manage my library" which has resulted in all my tracks being put into thousands of different folders because iTunes likes to create a separate folder for each artist. I was wondering if there was any way of exporting all my music in the iTunes database to a new location, organized by album. eg. A State of Trance 2010 Yearmix being exported to a folder called that, not each of the 80 tracks going into a separate artist folder.

If this can be done, I'm hoping to consolidate my music collection into one library, once and for all! It's probably worth noting that I'm now on Windows, but I thought I would ask here as iTunes is an Apple product. I have access to a Mac should I need to do anything "Mac-specific" to make this happen. Tune up looks like a promising piece of software. However, it only seems to clean up the music files themselves, not their organization within my music folder. Does anyone have any experience with it? Sorted! I'm sure there are loads of people out there that would like me reorganize the file structure of their music after iTunes obliterates it...so here's what I did.

1) Downloaded Songbird. What a great application! It has addons!
2) Went into the applications options. (Tools >> Options)
3) Selected the 'Manage Files' tab.
4) Ticked the box to 'Allow Songbird to manage files'. In the 'Structure Folders' section underneath I changed it to 'Album/Song Files'.
5) Clicked OK at the bottom to save changes and Songbird then wizzed through my collection and put all my music into Album folders!
6) Uninstall iTunes.