The real problem will probably be and always be that the exact capabilities of the RWR of any remotely modern aircraft is going to be secret. Not only that but the exact way airborne radars behave when they are providing illumination for a SARH missile.
Can RWR x detect a SARH launch using radar y? what about radar z? Its a mystery, I'm sure somewhere someone might know the answer but if there is they can't talk about it ;)
I think in terms of realistic simulation it would be safe to assume in general the RWR system in the M2000C-5 can detect the CW illumination that indicates a SARH missile launch from any of the radars used in the game right now unless there is some strong evidence to show that it cannot. That's my two cents anyway.