[ic] splitting out database files

[interchange-users@interchange.redhat.com (Gill, Jeffrey L)]

How do you separate the postgresql database files in InterChange 
from the rest of the application?  

What is the command syntax and what files need to be modified that
call and point to the database? 

My goal is to separate InterChange so it can exist on three 
different machines representing a three tier architecture -
web tier, middle tier, and data tier (backend database).  

I only want the minimum number of files required on the database 
server. Therefore what files are required and which ones can 
moved to the other machines? Is there a FAQ on this somewhere?

Are there any gotchas to look out for when doing this? 

Specs: Server RedHat 7.1 2.4.2-2 kernal everything build with 
Interchange 4.8 

I am learning Linux and Postgresql from scratch.

Thanks,
Jeff