Steve Massey builds wonderful software. Many engineers are already aware of his work with Digidesign and Trillium Lane. Since forming his own company MASSEY Plug-ins have rapidly become essential high-end tools for professionals. The DRT, Drum Replacement Tool is a recent release after an original freebie to registered users caused a groundswell of requests by new customers - now it's here at ToKwerX too.
There are several tools that offer this process of recognising peak-transients from drum tracks and creating either a 'spike' audio or midi-note trigger but I am yet to use one that is this accurate and musical. Demo versions are available from http://www.masseyplugins.com
If you're in need of such a tool check this AudioSuite plug-in for Protools out. In my opinion it's the best and most affordable one on the market.