I currently have a ISA firewall that also handles the routing for our LAN (192.168.1.0) with RRAS. I am setting up a Cisco ASA to link our network to a branch office (10.0.0.0 also Cisco ASA) with a VPN Tunnel. I have setup the ASA with an Internet IP on the outside interface and 192.168.1.240 on the inside interface. The outside interface is connected to our Cable modem and the inside interface is connected to our inside switch. So I have effectively bypassed the ISA firewall. I can connect through the tunnel from our office to the remote office but not in the other direction. Do I need to setup a static route on my RRAS server? Something like route ADD 10.0.0.0 255.255.255.0 192.168.1.240 METRIC 3?

Yes. Your machines are configured to use the ISA server as their default gateway. All non-local traffic will be sent to the ISA server and nothing to your VPN router. You will need to add a static route to the ISA server to bounce traffic for the branch office to the VPN router.Bill