I need information on Citrix Netscaler as Load balanser for ISA 2006 serve

I am using Microsoft ISA 2006 server as a Reverse Proxy for my Sap application to publish my Sap Web sits on the internet.
I want to use Citrix Netscaler as load balancer and fault tolerance for my ISA server.

I need technical design and architecture on this.

Please help me.