Superior Drummer 2 or 3? Version 2 is not really built to replace sounds of recorded drums. Version 3 is pretty amazing, but you will get better results by watching some tutorials on how to do it. Its actually so capable, that it can replace individual sounds from only a drum mix, as long as its setup correctly
So, if you are on SD 2, I would look at a better tool for the job. SD3 is at the top of my list(but might be more $$$ than you wish to spend) but there is also Slate Trigger, Drumagog and some others that I am not familiar with.