Looks like I found the right app after speaking with the company who suggested I use the core as it will do what I want.  Now the basic q's is more where to find.  I read the install, have it installed, have 2 servers added via snmp but looking for a little more clarification.  I have 50 or so devices I wish to monitor, but basics are disk space, server load, but the 1st major hurdle is our new database server.  We just moved to a new server running pgsql 8.4, and I wish to both monitor the basics like load, space, but also want to performance graph transactions per second and other pgsql things that our old cacti did.  So the question(s) is simply;

1. Out of the box install, to monitor a system and notify on alarm, does anything need to be installed on the client if snmp is enabled and working?

2. To perf monitor pgsql and such, same thing, do you need to install things?  I have read  a little on templates, etc. but not sure.  I am over page 70 on the admin guide but figured I would post as well as read for better chance to answer.

Naturally I will have more in depth questions as I move forward, but need this one box monitored asap.

Thanks.