|bob808 diagram is missing the ip addressing inbetween the vpn routers. He is listing the lan side ip addresses of the vpn routers.|
I don't think the linksys is a sophisticated enough of a router.
You need a router with multiple ethernet interfaces like a Cisco. One going the 89.x.x.x. and one going to 192.168.1.1. In the router you would need to specify persistant routes. One going to the 192.168.2.x network and all the rest going to the 89.x.x.x internet network.
Your lan would be in an entirely different subnet that any you were working with.
With your present setup there is no way to tell the pc how to get to the other side of the vpn AND the internet since both have the same gateway. This leaves it up to the router but the router only routes traffic to 89.x.x.x from side b.