Good to know about the new modding method.
Why must run a modded client in a IC enabled server? Clean client check is very important for those online competitions.
A cheater can use AIM-54 on Su-27 and make everyone know he is cheating. But he may also just modified his aircraft's weight a little lighter or gun round a little more powerful, getting some advantage without knowing by others.
I think the pure client checking is a must have function.