This is a good thing to know because I often wish for certain kit pieces that are perfect in one VST drummer and end up loading 3 drum VST's just to built the kit I want.
I found an easy a work around.
I simply load up the drum kit, enter a midi note for each kit piece I want, one per 1/2 measure, then export the song.
I then chop these up in Wave lab and save and name them.
I then dropped them into Session Drummers kit piece folders as WAVE samples.
They are not SFZ files so you only get the one sound no matter what the velocity but it works.
I also record my own real drum kit and made samples that SD plays just fine.
It's the one thing I still use SD for is it ability to play any sample. Don't believe AD will play custom samples.