Welcome!

In the preferences folder, there should be a pref.txt or something like that. Open it, and search for "Firsttimeplay". Change that from FALSE to TRUE, and that's it.

If it doesn't work, then do this:
Uninstall RTW, reinstall, apply patch 1.2, load game, go in single player->tutorial, play it (it's quick, and you'll learn how to play), and then install the mod. And that should be it.
Inform us of how it goes!