Great thread and thanks to all. This confirms my own experience as it seems that everyone is singing different words to the same song. Bonsoir Moreau, which has published lyrics on the web, is sung by both Bois Sec and Geno Delafose with different lyrics. Or rather certain lines are strung together differently.
To those who want to sing from published lyrics, I recommend this http://www.research.att.com/~ttsweb/tts/demo.php
link where you can type in text(in french) and have the app generate a spoken version. Then you can create your own phonetic cheat sheets