I got some furious commments once I long ago requested someone to leave his comment as an answer so that I could accept it and the points would go to the right person. Is it allowed to do such a thing or is that kind of "leading people to answer" not allowed through comments?
The correct response is:
If there is no response in a few days:
And if you get answers, it is nice (also increases the chance of positive responses in the future) to upvote the good answers, downvote the wrong answers and accept the best answer.
This is absolutely the right thing to do.
If the commenter does not respond in a while, just post the answer yourself (as a community wiki so none can spite you for wanting the rep yourself) and accept that.