Grouplens dataset Recommenderjob with Hadoop

[Stefano Bellasio]

Hi, i want to know which are the correct steps in order to use my grouplens 
data set (10M ratings) with Hadoop and RecommenderJob, with pseudo or not 
pseudo item based recommender. Right now i tried to follow the example of 
Wikipedia data set saw in Mahout in Action, but doesn't works or i don't 
understood how i can use RecommenderJob with the data set. Someone can explan 
something about this? Thanks :) Stefano