vegetation typing

[Beau Bush]

Hello, GRASS users.

Could someone tell me if GRASS has the capability to type vegetation areas 
using infrared reflectance.  I have a key made from a small portion of the area that we are studying that has each vegetation type catagorized.  I have been 
told that this is possible but I have no idea how to do it.  This was not my 
idea and I did not start this task but it has been left for me to finish.  Is 
there software that will do such a thing?  Any correspondance would be 
appreciated.  If I need to elaborate on this please let me know.  

Thank you in advance,

Beau Bush
bbush at ticsys.tamu.edu