General Questions

Hello,

I'm a complete noob when it comes to VPN's.  I know what they are used for!   
However, I've obtained a couple of Yawarra (Monowall) VPN units and am trying to configure them to provide the firewall and IPSec capabilities.

I've drawn a diagram showing my current configuration and where I imagine the VPN's will insert. 

Assuming that the routers are already configured and working, could anybody suggest how I should configure the Monowall VPN's?
If I need to reconfigure the IP addressing on the three PC's, that is fine.

Also, on each PC, do I set the PC's gateway to the VPN address?

I've previously read that my LAN & WAN sides of the VPN need to be set in different subnets (192.168.1.x/24).  Is this correct?

OK, I've answered some of my own question.   Yes, the VPN's are correctly placed.