Adam---re bluefin installation look in the archives, Malford posted a full how to do it with pics and all the information some years ago. It's done via the diagnostic port and takes just over 15 minutes. The Bluefin hand set prompts you what to do as you do each step.
Richard there is loads of info about the EGR in the archives some of which I've put in. Cleaning might work but usually it doesn't. The quickest temporary fix which costs nothing is if you have a Euro 4 EGR, Make sure the valve is fully closed then disconnect the electrical conection to the EGR. The management light will stay on but the engine will run fine, As it is now yours could suddenly go into limp mode with a substantial loss of power-------not good if you're overtaking!
Advice for anyone with a problem ----search the forum archives first There are years of good info to be found in there all you need to do is read it!