Windows 2003 to Windows XP site to site VPN

Hi everybody, my computer wants to use VPN for file sharing, and to run our handpunch system and potential our phones (we have a VoIP PBX at main office). We have windows 2003 sever at main office running RRAS and 20 remote locations with just a few computers each running windows xp. I want to use one of the PCs at each remote location to connect to the VPN at the main office and share it with the other computers and devices at the remote location. After looking around it looks like the only way to share it on Win xp is to use the windows internet connection sharing, which acts like a router. So far I figured out that I could add a line to the routing table on each pc so that if the ip is in our company subnet (10.1.1.x) to go to the vpn. But for internet and local ips (192.168.1.x) to go to the site router. I then figured for the handpunch I could set the default gateway to the vpn pc and on the vpn pc port forward to the handpunch. The handpunch server at main would is the sites vpn pc's ip. Then I got stuck on the VoIP phone. I could port forward for one (i assume they would require port forwarding to work?), but how could I do more than one phone? It seems like it would be easier to bridge the connection, but it doesn't look like you can do that in win xp. Is there a way to do that in win xp?

Question Summary:

Using Windows ICS on a VPN connection is there a way to run more than one VoIP phone over it?

Is there a way to bridge a VPN connection in Win XP to the Local Network Connection (the wired NIC)?

Thank you soo much! Any help is greatly appreciated!