Outbound NAT - OpenVPN. Site-to-Site

[burn0xdc]

Hi guys
I tried to configure outbound NAT, but without success.

Thats what i got:

LAN1 (192.168.1.0/24) - pfsense site1 (openvpn client) - wangwSITE1 – wangwSITE2 -- pfsense site2 (openvpn server) - LAN2 (192.168.20.0/24)

So I need to route traffic to specific IPs from LAN1 through pfsense site2 and mask this traffic with nat of pfsense site.
That means specific hosts should seed pfsense site2 IP.

Please help.