I have the same problem, I just HAVE to have all the brushes from ALL the sites
. I've just started trying to organise them by creating a page for each brush set I have and using FlipAlbum to display all the pages. I include the name of the brush set, the location on my hard drive and where I downloaded it from. I should then just be able to browse through and find the brush I want easily.
You can download a trial version of FlipAlbum from
www.flipalbum.com.
HTH.