Multiple Subnets on a ASA5505

[Imtiaz Hasham]

I have a Cisco ASA5505 setup as follows:

Internet -> (Dynamic IP) Cisco ASA5505(5 Routable IPs) -> Draytek (Single routable IP) - 172.16.0.0/19
                                                                                           -> Draytek (Single routable IP) - 192.168.20.0/24

I want to remove the 1st Draytek router and on the Cisco and setup in such a way that my internal subnet and the routable IPs don't intervene please?

[Imtiaz Hasham]

Just to add something to this - Once a PC is connected to 172.16.0.0/19 - it should be NATted to the public IP (without having to use another router inbetween).