PIX source nat before going through tunnel

[firestartest]

Is it possible to nat the source address of a network before passing it through a VPN tunnel? Example: src:192.168.1.0 /24 dst:10.1.1.0 /24 get's nated to src:10.2.2.0 /24 dst:10.1.1.0 /24

Is this possible on a PIX?

[mchin345]

This document provides examples of basic NAT and PAT configurations on the Cisco Secure PIX Firewall. This document also provides simplified network diagrams. Consult the PIX documentation for your PIX software version for detailed information.

http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_tech_note09186a00800b6e1a.shtml