What are the instructions you have now?
Here are the online help manuals:
Installing Management Center for Cisco Security Agents 4.5.1
http://www.cisco.com/application/pdf/en/us/guest/products/ps5057/c2001/ccmigration_09186a00804211c7.pdf
Using Management Center for Cisco Security Agents 4.5.1
http://www.cisco.com/application/pdf/en/us/guest/products/ps5057/c2001/ccmigration_09186a00804ae4bd.pdf
Release Notes for Management Center for Cisco Security Agents 4.5.1
http://www.cisco.com/univercd/cc/td/doc/product/vpn/ciscosec/csa/45/45rn/csa45rn.pdf
You should pick up the book "Cisco Security Agent" by Chad Sullivan. I picked mine up at Barnes and Nobles but you can also get it directly from ciscopress.com or from amazon.com.
http://www.ciscopress.com/bookstore/product.asp?isbn=1587052059&rl=1
There is also a newer book called "Advanced Host Intrusion Prevention with CSA". This book focuses more on the pre-deployment phase - gathering information about your network, planning out your rules, some standard practice scenarios, etc.
http://www.ciscopress.com/bookstore/product.asp?isbn=1587052520&rl=1
Hope that helps.