I am not sure I follow. There is mention of static routes, Static Policy NAT and VPN ACLs?
For starters you should not need to modify/add any static routes when we are talking about a L2L VPN. VPN connections are 99% of the time formed through the interface that has the default route out of the network so you wont need to add additional routes for remote networks typically.
As to the Static Policy NAT or NAT0 configuration we would need to know both your current ASA software level (since it determines the configuration format of the NAT) and we would also need to confirm that your local IP address for the VPN connection is 10.1.12.164? and the remote networks are 192.168.50.0/24 and 10.10.3.0/24?
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...