how to normalize redundant CSS?

Hi group. Long time first time.

I just inherited a project with a big crush of excessive CSS in it. YUI is to 
blame, and I absolutely don't mind a little fuzz between the various browsers.

I can rarely figure out the right danged style to change to get something simple 
done, like change a div's float from right to left.

Does anyone know a tool that reads a page's CSS, normalizes it into one flat 
stoopid file, with all the duplication taken out?

Otherwise, where's a crash-course on YUI? (Preferably one that's better than 
where Google would go?)

-- 
   Phlip
   http://flea.sourceforge.net/resume.html