Session Drummer and articulations (choke, hihat pedal etc) trigger with Alesis DM8

I just purchased an Alesis DM8 and have connected to trigger Session Drummer.  95% of everything is already mapped. However I have not figured out how to map the cymbal choke and the hi hat pedal and or found the samples which would correspond to the articulation.  I also have BFD2 and was able to make a drum map. BFD2 is cool however more labor intensive.  SD3 came with a few drum kits that I really like and it sounds good and is easy to use.  Anyone know how to create a drum map for session drummer and how/where to get the additional samples (if they are available).
 
Also, I have created the drum map for the Alesis DM8 to control BFD2 if anyone needs it.

I wonder if SessionDrummer is eDrum-compatible. But I would be suprised if BFD is not.

I have SuperiorDrummer 2 and there they have a ready mapping for eDrums and it worked right out of the box with a Yamaha drumbrain. Check what is available inside SessionDrummer and BFD about this.

I would experiment from a midi keyboard and see if/how you can get different openness of hihat.

Closed HH are usually at F#, and fully open at A#.

As I understand it there are two ways to have the HH pedal work in the drumbrain:

1. Sense the position of pedal when hit, and send a different midi note for each(or at least a couple of different ones).

2. Send the CC04 with a value and let other end interpret it to correct samples.

So check out if there possibly is a setting in drumbrain for different approach.

And check specs of SessionDrummer regarding midi stuff.

And there are many ways for a drumbrain to send chokes as well. Some use aftertouch, some don't.

In the Yamaha brain you can set different approach to sending notes, whether note off are sent and when, if sensing a choke and then sending it. Check out how Alesis brain does it.

I found a way to get a cymbal choke when I converted a midi drum sample to a step sequencer clip.  Here's what I found.  Cymbal name followed by note number.   (clshat-42) For my closed Hat.  (opnhat-46) For the open Hat.  (pdlhat-44) For the choke closed.

Something else that may be of use to you with BFD2 I just read on the BFD2 forum is a quick guide on creating midi maps.

On the mapping page in BFD2, clear all keys and make sure the box called "midi select" is checked. Then just hit your first pad, this will select the corresponding key, so you just assign what ever kitpiece and articulation you want on that pad. 
Do this for all of your avaiable pads and you have your custom map as you want. Finally save your keymap in order to use it in other projects. 
Not sure if this would work for chokes though because they are assigned to different groups.
Could be a case RTFM 

Hope this helps

Steve