Maybe this has been covered before, but the search feature here is not the best... anyway, you may find that in your productions, when using realdrums, that no matter how you eq it, the bass drums dissapears... So, what I do is find a biab midi drum pattern that is similar, export that, use your favorite drum plug in, isolate the kick drum and bring it up in the mix till you can hear it and works with the rest of the mix.. This doesn't work for all types of music, but for rock, country, folk, pop, it's pretty easy to do...