No, Sinuhet gave up on it because the pack that the demo runs from is significantly more complex than the Rome demo's was. He's waiting for the second demo (24th Oct, by all accounts) to try that one with the hope it is more easily mod-able.

However, if it takes a few days for that to be modified, we're near the start of November and only a few days away from the full game release. So unless it's miraculously easy to break open, I doubt any demo mods will be available before the full game is.