Why do people want to fly Heli's in IMC? A small machine like an R22 or 44 is totally unsuitable for it, being far too pilot intensive.
A good IMC machine (Be it fixed wing or rotary) needs to as stable as possible, something an R22 isn't particularily good at.....
This is more important than any arguments about single engine worries.
With a Heli, if the weather turns to cr*p, then land. That's the beauty of a helicopter, it's ability to land anywhere.
Don't press on into IMC just to get somewhere. If a meeting is that important, get an IR and a fixed wing machine, or spend millions on a suitable helicopter.