I thought Region 0 was open to all, techies please prove me wrong!

The different TV format PAL/NTSC 'might' be an issue but a computer should be able to get over this. It seems easier 'this way' in that US dvds play OK (generally) on UK players of all sorts (unless ancient).

There is freeware software called VLC from www.videolan.oeg that I know from experience works on UK discs in the US if you have problems.

Nick