The fuel pressure reg 'could' be at fault but the sixteen zeros would strongly imply that there are no injector codes stored so would be my first task.

The problem with a non-starting car, is that the act of turning it over can flag up codes, even though the components may not actually be at fault.

I'd definitely focus my attentions on making sure that the ECU has the correct injector codes. It won't start without the right ones, and you could be swapping sensors and components all day long and get no where.

If that doesn't work then I'd take the injectors to a Delphi specialist and get them to test and recode them. It will save you a lot of hassle in the long run if you bite the bullet and get a Delphi specialist (not just any diesel garage) to help.

I've seen people try and fix them 'on the cheap' countless times over on TalkFord, and it just doesn't work. There's a reason why it was sold cheaply, so don't fall into the same trap as the previous owner!