Hey people

I really need help into the reading order of Countdown to Infinite Crisis & Infinite Crisis.
People are saying different things and i don't know which way to go.

Help needed because some people are saying to read approx about 500 comics - I think that is going overboard, but if it is true, i will do it. I just need a concrete reading order!

Yeah they are numbered but there are also comics in between those that have sub plots and stuff that are not numbered... otherwise i obvioulsy know the numbered order! lol