You need a TV card so you can connect the Camcorder to TV arial socket then scan for camera, like you would for channels although, if its got a AV then you do not need to scan. You should be able to freeze frame and copy to clipboard then past into a Photo edit program
Internel one: Leadtek Winfast TV2000 XP Expert TV/FM Tuner with Nicam Stereo and Full PVR with Direct Burn Remote and Teletext £36.55 click here, very very good picture quality, come with Ulead Videostudio 7.0SE, the best value for money video editing software
Externel USB 2: Belkin Hi-Speed USB DVD Creator £44.4 click here.
If you want to get the Best in quality, you need to pay over £1000 even more. I am not familar with that product range so cannot recommend one.
I have used the Belkin USB device mentioned by TomJerry with great results, although I will mention others have had problems getting this device to work properly. For software I have found Ulead Video Studio my favourite.