Skinoku

Level 1
Hi everyone!
I have some laptops that are being used in many different places and would like to have FTP and VNC access on them available.
As long as the computers are not always connected to the same network and many networks are not mine I cannot forward ports on the router so I'd like a piece of software or a script to automatically forward (at startup?) some ports taking advantage of the UPnP technology available on most routers.
I don't think it's impossible as long as uTorrent and Emule for example do it automatically. :)
Thanks in advance.
Cheers!