With me7logger you can logg everything on the engine at the same time, with vag-com you can only log 3 groups.
Here you can read about it:
http://www.rs6.com/showthread.php/25...ight=me7logger
But it took awhile for me to get it up and running and to understand how it works.
But now I use ME7logger every time i want to log a run.
Here you can see some logs from me: