You can use EZDrummer or Superior Drummer with REason now the EZDrummer have made a standalone player called Toontrack Solo which you can download for free.
This means that you can slave Superior Drummer to Reason. I have also set up an e-kit to use with Superior Drummer by using the MIDI Learn function in Superior Drummer. This means the kit can be controlled by both an e-kit and from the Reason Sequencer.
You will need to get a free virtual MIDI app
PC:: Loopbe1
Mac: Soundflower
In Reason: You create a external MIDI instrument in Reason. Route it to the Loopbe1 (eg: pc)
In Toontrack Solo:
Load Up Superior Drummer etc
Go to Options/MIDI select ‘Loopbe1’ internal MIDI
Now your Superior Drummer is slaved to Reason.
Additionally you can create audio tracks in Reason to record the audio as well as the MIDI data from Superior Drummer.
The video below explains how to do this on a Mac. Rock on m/
