Don't know if any of you Chefs saw this but it seems like a pretty good idea.
[DRIVER][04.08.2009] Extendir (Boost Windows Mobile) & Preset Installer (Visual UC)
"Extendir is a file system filter driver that significantly increases the performance of your phone, in specific situations even up to 12 times as fast and faster…
Just cook it in to your rom and of you go!
A nice side effect of the architecture of Extendir is that you should have longer battery life!
(I don’t have real test results for this yet so I don't know how much longer you do with your battery but I've heard confirmations.)
But Extendir has also a very nice bonus feature: it can extend your windows directory!
Every file (not folder) that will be installed in the folder “\Extendir\WinDir” or in any one of its subfolders will get a virtual alias in the windows folder. When the OS request the file from the windows folder, it will be redirected to the real location of the file without the OS ever knowing about it."
This sounds amazing in theory because 75% of the ROMs I've tried have had issues populating the Windows Directory Which inevitably caused occasional lag and slowdown when the OS tried to grab a file.