I read recently in the Request Apps forum of two firewalls you can run from your USB drive (ghostwall and AS3 Personal Firewall). I was wondering if anyone could tell me how these work? What, if anything, needs to be done to configure these apps to run from your USB. At home I have firewalls (software and hardware) on both my computers, but in the event I bring my external drive to surf with Portable Firefox while travelling, I would like to be able to quickly start a firewall while I surf and then stop when I'm done. I encourage all my friends and family to use firewalls, but some just don't want to use them, hence my interest in these portable firewalls.