Configuring GoogleTalk with Asterisk 1.4.8 on OpenWRT whiterussian 0.9

This article is a HOWTO for configuring GoogleTalk with Asterisk 1.4.8 on the Linksys WRTSL54GS running OpenWRT whiterussian 0.9

My network environment is as follows:

Cable Internet -> (Public IP @A1) WAN [Dlink DI724U] LAN(Private IP @B1) ->
WAN (Private IP @B2)  [ Linksys WRTSL54GS] LAN(Private IP @C1) 
                   -> Home PC (Private IP @C2)  running GoogleTalk Client
                   -> ATA     (Private IP @C3)  with one analogue phone

Install ChanSkype on FreePBX/Trixbox

This is my first posting (ever) so please, go easy on me.  I will state up front that this work is based on the input of several people and draws on those resources including the excellent script by Tim Hunt as well as feedback from ChanSkype themselves.

Once again, this is for a FreePBX (confirmed installation on Centos 4.4/4.5 and Trixbox 2.0/2.2 systems)

I’ve posted in bold the actual text to type.  Hopefully split lines are not a problem.