Sorry guys - my bad on the "ISOs". I was busy burning a CD at the time I wrote it! I meant IFO file or VOB. To clarify, I just decrypted the DVD to the hard drive in its raw format and then tried to play using MPlayDVD.
Thanks for the advice - I'll try the PAL setting, or the VLC method and report back.
I'm guessing that this will also fix the slightly weird colouring I was getting too? Wasn't too bad, but the picture just looked a little "fake", is the only way I can describe it. Once I have it set up properly, should I expect the exact same quality of picture that I would get from an (average) DVD player?
If I can get this working, I will be suitably impressed. SlimRoku and MPlay are bringing the new AV setup to life - excellent efforts TheEndless and marcelo3d!
Also got userkeys and application scripting thanks to posts here from pxegeek and clovold, so I now have one touch access to digital music, video playback, dvd playpack, weather, photos library and even the london tube map using a Harmony 885. Sweet...