I have a Linksys WRT54G and a XP Pro and XP Home PC. I want to VPN into them both. What do I need to do?

I am unsure how to do the port forwrding, how can I forward to 2 different machines? In the setup I can say forward these ports to xxx.102, but I also need them to go to xxx.103 if I chose the XP Home PC. How can I do this?

Also, XP Pro and Home both can be VPN servers with PPTP, right?