In config.ini :
[Startup]
ReserveCache=x
Where x is the value to use, e.g. 60. Use jEmplode (or Emplode?) to edit config.ini to remove the ReserveCache line. If you don't know where to look it is probably because you didn't edit the file to add the setting in the first place, so your config.ini won't contain the setting (unless you bought your player second-hand, in which case it might or might not be there).
Once you have changed the file, you will need to do a sync to update the file on the player.
[Edit: for clarity]
Edited by mdavey (05/11/2004 10:50)