Stumbled upon this today... it seems like a very neat project someone has been working on... Looks like he is heavily into Saab cars, but also made a VAG tuning suite (free) that finds and labels all the maps for tuning Pupe-Duse cars.
He has full on documentation as well!
http://trionic.mobixs.eu/This is a particularly interesting document... looks like Diesel tuning basics... building an interface, etc..
http://trionic.mobixs.eu/EDC15P/VAG%20EDC15P.pdfIts very neat, I've been using it for a little while although I've only actually tried it on my 115tdi, but it works really well.
I couldn't actaully believe how easy it was to use, although you do obvioulsy need to know what you're doing but there is plenty of info on the WWW if you need to find out...
COnsidering its free as well it's even better.
I've not lookedinto the checksum though as I got someone to check the file over first and check sum it before I used it as sh*t scared of bricking the ecu and not having an easy bootmode recovery process to hand..