It won't be soon, I guess, since ICAO - city/town mods compatibility still needs to be worked out by the respective mod author(s).
You can use it, and it likely won't lead to an unstable game - apart from a few citizens potentially behaving a bit weird here and there. Read recently that Arthmoor did an inspection of ICAO and he could not see what made compatiblity of this mod such a "special" issue. Waiting a bit more on the development of that topic. Until then, I won't be updating the guide I'm afraid.
ok thanks for the information.