The real meat of this story is on this page, where our hero the story wrangler meets Tintin and a more realistically alcoholic version of Captain Haddock. They are not identified by name, but the caricatures are obvious enough that any casual reader of the story in the original French would know exactly who they are. 

(Heavy Metal issue #136, January 1992 – Page 47 Raoul Fleetfoot and the Mysterious Plot by Tronchet and Gelli)