I have now installed this ROM, can deploy apps like advanced configuration, which would indicate that the interop lock is no longer there, but any changes I make in either advanced configuration or the pre-installed registry editor do not save.
I don't get any error messages in either, but, for example, when in advanced config if I was to add a new tile colour to the themes, then press settings to apply the newly created colour of choice, it is not there. I have tried adding the new colour, closing AC and re-opening it again, but it just disappears. Same thing in regedit on the phone. Add new/edit key, close and re-open to see it gone
Any ideas?
(using Titan)
EDIT: Just to add - 'MyRingtone2SMS' works fine, which I believe edits the registry.