I finally translated the tutorial I made in french language that you can find here :
French version is here :
I've not enough karma, but you 'll know how to go there.
Now, the English version is here :
Beware : My native language is French. I have a few kowledge in English speaking, so I used Google Translator sometimes to help me. If you find some mispelling or bad translation, feel free to post here, I'll make correction ASAP. I hope this is well understandable.
Also, as I'm not an OpenERP Guru, so maybe you may find a better way to do a thing or write a function. So , do not hesitate to comment .
Also, I created a new account here because my other account was made with a email address that is owned by the company I worked, but I just lost my job today ....