The only difference is that on your NAT devices on the outside of each PIX, you'll need a static one-to-one NAT translation for the actual IP address of the PIX, and then point each other PIX to that NAT address in the crypto configuration.
If you can't change your home LAN from 192.168.1.x, then it gets difficult and you'll have to use the new features in 6.2 code and follow this sample config:
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...