how would i do this? what IP would i use? i am using an airport router. how do i relate my router's ip to my local ip for my mac to access my computer outside of my network?
I have the same setup (on Tiger). Go into your Utilities folder (on your mac) and open Airport Admin Utility. Find your router and click "configure". You can find your computers IP here (not the 10.0.1.x one). Goto Port Mapping. Click Add.
Public Port:5900
Private Address:10.0.1.2 (might be different depending on how many other computers are on the network)
Private Port:5900
Click ok. Close Airport Admin and go into your system settings. Go to Sharing. In the "services" area check the "Apple Remote Desktop" box.
That should do it.
Enjoy.