A couple of questions about the start...
1)How were the OAS able to compile dossiers on contract killers?
It isn't really the sort of thing you can research. And even if it was, who did the research?
Rodin says 'we' compiled dossiers but was showing the results to supposedly the only two other people who knew about the plot to hire a contract killer.
That means someone else must have done the research but the OAS was in the Jackal's words 'riddled with informers'.
Was Rodin lying when he told the Jackal that the plot to kill de Gaulle was known only to the four men discussing it in the room?
2) The Jackal says assassinating de Gaulle was 'a once in a lifetime job. Whoever does it must never work again.'
Why?
It doesn't matter how profile the target is. If the Jackal gets away with it without detection then he could take on more assignments.
To be honest these are minor and probably necessary plot-holes to the story.
It's a fantastic film.