Chony,
you may check M-Audio Drum & Bass Rig, http://www.m-audio.com/products/en_us/DrumBassRig-main.html but you have to hear it yourself beforehand, as my opinion will not be sufficient as I have never heard a Tyros 2 drumset.
Unfortunately, due to moving, I have no easy access to my home PC, but if you care enough, send me a drum & bass only midifile (say channel 7 bass, channel 10 drums) to trident1971 AT gmail DOT com, and I will try hard to record some sound samples for you (please inform me here if you send something). If I remember well, Fran Carango has this module or its close sibling, Key Rig.

Alternatively, and in a higher cost, Hypersonic 2 may do the trick.

Never managed to make EZ Drummer work in my PC, it was probably damaged when it fell off the truck.

Try to contact Bluezplayer or rikkisbears or Frank Rosenthal at the Software Arranger forum. They know lots of things. There is one possibility you have to do some programming if Tyros drums are XG mapped and the module you finelly decide to buy is GM.
Hope this helps a little.