@ Chacal: I wouldn't, unless you've gotten his blessing to do so. Not the best thing to publish someone else's work without their permission.
From what I recall, Zawal had an issue with being bullied, or at least feeling like he was bullied. That's what drove him out of the French TS community, off the official DTG forums, and finally away from here. A dern shame too as he was by far the best freeware route builder in the biz, able to fill his routes with a sense of life in a way I've never seen anyone even try to do before or since.
If you really want to, I think you can still find some of his old routes on Railsim-fr.com. Sadly, his Steam Workshop routes are not among them. But please be respectful and don't republish another person's work. At best, it's still done without permission. At worst, it could be considered stealing, even if done with good intentions.