NO PDM link that I know of. The gist of it is that you need to create nat/global pair on the PIX - a policy "PAT" (nat with acl). Then use the NAT'd IP as the source in the crypto acl to the remote network.
Example:
access-list natvpn permit ip 192.168.1.0 255.255.255.0 REMOTE_NETWORK_IP REMOTE_NETWORK_SUBNET
nat (inside) 10 access-list natvpn
global (outside) 10 172.16.16.1
access-list cryptoacl permit ip host 172.16.16.1 REMOTE_NETWORK_IP REMOTE_NETWORK_SUBNET
crypto map test 10 match address cryptoacl
Good luck.