Good afternoon,
After looking into the possibility of this working with our products, I've determined that with the Small Business products it's just not possible. Unfortunately the vpn wouldn't support any type of dhcp relay that would allow one of your local machines to become a client of the remote network. You could try assigning the local machine with a static ip address in the dhcp scope of the remote site, but I doubt this would work as the local router would discard a packet it couldn't recognize.
I did ask a couple of engineers on this, and it does appear our enterprise products may have the capability of doing this.
Unfortunately, it doesn't appear that our Small Business Products currently support this feature, and I doubt it's currently on the roadmap; any feedback or opinion from anyone else is more than welcome.
Thanks,
-Lindsey