Memory managing on XP

From: Ferdi (passer@compuserve.com)
Date: 01/31/03 

From: "Ferdi" <passer@compuserve.com>
Date: Fri, 31 Jan 2003 14:52:54 -0800

I have a Mobile P4+512MB+40GBhdd+XPpro:
I am having some problem on my computer that seems to be
memory problems.
I would like to have a help on which is the best
parameter for RAM cache: Size indicated by me? The
default size (768-1536), or a grater one? Or it is better
let the system manage the space for the cache.
Or it is better to find a softwear to manage the memory
that XP can't manage?
Thanks a lot for any help.