[Zope] Confused about caching

[Brian Sullivan]

I am building a zope based application to manage the (medium) volume
delivery of a large number of what are essentially static documents
from a central server. 

The server itself is a Win2003 server -- I think with 3.x Mhz cpu, 1
gbyte of memory and reasonably fast hard disks but I don't have full
control over it. It is only being used as a zope server -- no other
requirements. I have no control of upstream caching ( though there are
caches strategically deployed in this corporation to manage bandwidth
usage).

I am looking at local caching options available in Zope 2.6.2 (Ram
Cache, Accelerated HTTP Cache) and am not sure I understand the
purpose and usage of those products.

Is it likely that I will be better off using no local caching? If one
of the standard Cache products is recommended how do I configure it?
How are elements associated with the cache? Can I locate the cache in
a "sub directory" and have it cache all elements below it in the
hierarchy automatically.