I'm really liking the VNC solution described above. If you can get through the router forwarding bit, it's quite nice. Log Me In, or CoPilot might work well enough to set up the router forwarding, but the really nice thing about VNC is you can initiate the connection with Grampa's computer. Right now I've got skype running on Grampa's computer and everytime he sits down at the computer Skype alerts me and I can be on standby to help if he needs it.