Never heard of that one either. Remove the queen twenty four hours before introducing the new queen, so the hive realizes its queenless.
I would place the Russian queen atop the frames and see how the bees react to her. I would still introduce her caged, but if it looks like they want her, I would let them have her after a few days or so. No offense, but five days sounds a little extreme IMO, unless there are obvious acceptance issues.
You can tell pretty much right off if they are accepting of a new queen by their behaviour towards her. Are they agitated, trying to bite or sting? Or do they converge on her trying to lavish her with their proboscis?