So, my friend just got a mac, and i want to help her with some questions she has. I also have a mac, does anyone know of any programs that are free to help me out? Thanks!!
Basically, enable Apple Remote Desktop in System Preferences...->Sharing on the other Mac, download and install Chicken of the VNC on yours, make sure the routers are set up with the proper forwarding, and you'll be fine.
I remotely control my parent's Mac (and PC) using CotVNC. No issues, other than slowness.
Edit: unlike what the guide says, you won't need to install a VNC server. Tiger (OS X 10.4) has one built in, accessible via System Preferences...->Sharing->Apple Remote Desktop.