The EXS24 is Logic's sampler. It has some electronic and acoustic drum preset which you can browse through.
The EXS24 allows you to assign different MIDI channel to different drum samples.
So if you use MIDI drums like the V Drums you can assign the Kick sample in the EXS24 to the same MIDI channel as your Kick MIDI channel on the V Drum kit.
You could save this setup as a template so that you don't have to set it up each time, as it does take a few minutes to set it all up.
This is explained in some of the MacProVideo tutorials. I will have to take a quick look though and see which ones they are.