Need Yahoo Voice and Yahoo Webcam Port Settings for Linksys Wired Router?

I have a befsr41 linksys wired router and trying to hook up voice and webcam on yahoo, but need help with getting yahoo msgr and chat to work with Gateway Pg. and port forwarding I think? Can any1 help? I can access the rooms and msgr, but no cam or voice, I am pretty sure if I dc the router and reset ip settings on xp and hook up direct to modem, everything would be fine, but want to keep my router.