Hook get at me man! look if you use fruity loops use the slicer you can find loops with FAT drums on em.....put it in the fruity slicer or use RECYCLE and chop em.....chopping is a part time thing for me because you always searching for the phat kick or snare....then you can layer, but layering isn't always necessary if you find a good loop from either vinyl or find some loops yourself....and then once you slice them you can edit the slice and snatch the one shots...this to me a very important aspect to get good samples and it's fun too......do you have any vinyl that might have good snares and kicks?
I recommend getting Recycle, its fast and clean and you can either export to a soundfont or to rexx and use in Reason or Fruity.....
I have about 3 or 4 gigs of kicks and snares, some meticulously lifted and some collected and traded, I trade with Drumatic a lot, he's a member but he doesn't post on here a lot, he's another Philly cat, I actually sold my SP12 to about a year ago....
OH on top of saving to folders I create kits in Fruity loops as say a template and name them according to how hot or useful the kit is with a kick and snare already mapped, that also makes for faster production too and I even put a bass or guitar and string on there too and leave a blank channel to load a sample if I feel the beat needs one....