I have found the project on hanging kitchen cupboard doors very useful, but there is something I would like to ask which I don't think is covered by the project - I'm pretty sure what the answer is going to be, but I'll ask it anyway.
ie. Is there a way of adjusting one corner of the door closer to or further away from the cupboard, without making a change to anywhere else on the door. I would find this very useful in 'lining-up' a pair or more of doors to ensure that the doors look level even if the cupboards behind them are not.