@tunge2:
is it possible to add a tunX interface to the firewall (or is this not nessesary?) is it also possible to add a static route for the openvpn interface?
Routes are automatically added for whatever network you specify in the Remote Network field at either end as soon as the tunnel becomes active. If you have more then one internal network on local end, then you can assign static routes at the remote end, and vise versa.
I haven't tried working with the summarization of networks, for example using a static route for 192.168.0.0/22 for subnets 192.168.0.0/24, 192.168.1.0/24, 192.168.2.0/24, 192.168.3.0/24.