Discriminative Learning for Single Digit Recognizer Using HTK

I made an experiment of single digit recognizer using HTK toolkit by following the steps given in attached file.(I did not create that file just followed steps in that) Now I want to have a single digit recognizer that also uses Discriminative Learning feature of HTK. If you are able to do this **I would like to make a document that describes steps necessary to introduce discriminative learning and also a script that can do all necessary steps.** Script can be perl script or can also be in another scripting language plese mention in your comment which language you will use to make script.