I think its worth mentioning that going inadvertent IMC in a light helicopter not approved to fly in IMC (Not just R22s or singles) with a pilot who has only had the basic instrument flight training is a world apart from an instrument rated pilot having pre planned a flight taking into account minimum altitudes for terrain clearance, freezing levels etc, flying a machine certified to fly IMC.
I think the 5 hours instrument training will lull some people into a false sense of security to think they can do this, it depends on the person. I think the 5 hours could be better spent teaching students how to avoid going IMC in the first place.
My advice is do what ever you have to do to stay below cloud in the first place, if you make a decision early enough you should be able to divert to another airport etc but ultimately if you can’t do that then stick the machine on the deck.