So, I'm familiar with doing the direct connection with two VPN devices, and I suspect that you can do it with a third easily enough as if it were another client
of the primary VPN host. If this is not the case, you'll want to download the Netgear Software VPN Client for one of the PC's
Find it here:http://www.netgear.com/Products/Software/V...are/VPN01L.aspx
The other FVS318 could be directly connected.
I don't know the specifics of going in through one router and going back through another gateway/VPN device but I'm sure it can be done.
You could also use the software client to connect to either device, But it sounds like you want a consistent connection?
You may be able to find specifics on what you're looking for at Smallnetbuilder.com