Increasing the Folder Cache

The default setting for WindowsXP is to cache the Explorer settings for 400 folders.
To increase it:

   1. Start Regedit
   2. Go to HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam
   3. Change the vaule of BagMRU  to whatever size you want (hex)

    1000 - 3e8
    2000 - 7d0
    3000 - bb8
    4000 - fa0
    5000 - 1388