I noticed that I had taken some notes of the 7878's thread and I thought it would be a good idea to put them here. I didn't want to write them in my current thread because I think it can be used by many people. These notes are actually only quotes from the thread of 7878 ; quotes that I found interesting for many reasons. Of course, some may not be interesting for you but if you also have some advices, post them here NB : I won't be able to say who told what because I had written the notes on an email without quoting the person. So, sorry for the people who have been quoted.