The new drum replacer rocks!

You can either drag a sample into it (even one of the snares from the track, if you have a good one) or simply drag the clip to a midi track to drive another synth (e.g. Addictive Drums). The drum replacer dialog lets you preselect common GM midi notes but of course you can change it in the piano roll or in the external synth.

Here is how I do it.  Say you are working on the kick drum.  You highlight your kick drum track, create region FX and add drum replacer.  Adjust the parameters within drum replacer so that it captures the kick hits appropriately.
 
Now...  Click to highlight the kick drum track again.  Click region FX again, and this time, select "copy midi events" or something to that effect(it might not be worded exactly like that but very similar and is self explanatory).
 
Now simply create a midi track, and paste into the midi track(I just hit CTRL+V and it plops in the midi, but you could do the edit paste or right click and paste too).  Voila...  you now have midi that matches up to all of your kick hits and you can route it to whatever sampler you want.
 
Just load an instance of addictive drums(or whatever sampler you choose) into a track, and set the output of the midi track to addictive drums and it will trigger any kick available in there.
 
the worst thing that could happen here is that the midi note it created doesnt align with the right key in the piano roll to trigger the kick in whatever sampler.  in that case....you can just highlight all the midi notes and drag them all to the right key(the one that triggers the kick if thats what youre working with).
 
You can do this as many times as you want for as many drums as you want and point them all to addictive drums or you could split em up and output them to a bunch of different drum samplers

I used it the first time the other day just to trigger hand claps over the snare. I'm used to Slate Trigger 02 which is a monster, Drum Replacer was far quicker for the purpose. I think it's a great tool for simple stuff.