VPN Infrastructure Question

A company I work for, location A, has recently acquired another location, we'll refer to as location B. Location A has a Netgear FVS318 VPN Firewall Router. Location B has a Linksys RV042 VPN Router. I need to set up a site to site VPN between these two offices. I have purchased a Linksys RV042 for Location A, but I was wondering if I could use the existing hardware, or if there is any way I could hook up the RV042 and keep the FVS318. The issue is we have a lot of special ports open and forwarding and its already configured in the Netgear and working fine. The ideal situation would be to keep the netgear as my "Router" and the Linksys as my "VPN" box. I'm afraid there will be complications because they are both technically "Routers". Let me know what you think!