Q1 - Dual NIC

Can anyone help with this please? I have a internet connection like so... (www) - (translating router) - (NIC _ Squid Box _ NIC) - (LAN) This all works fine however, the win2000 server has a mailserver that needs to see the router how can I do this? At the mo I'm still using the old ISDN connection for mail only. Any ideas please other than a mailserver on the squid box - see Q2 Kind regards Adrian Wells