hi there,
What I really want is my windows machine at home to appear as if it is on the office LAN.
what exactly do you want?
if you want your home pc to get an ip from your lan range then bridging is for you..
if you simply want to access pcs&servers behind openvpn server then routing is ok...
i hope you understand the differences and pros/cons of both setups..
Regards
Michael.