This is a follow-up to a Weekly Photo Fun thread discussion that started at http://model-railroad-hobbyist.com/node/32447?page=2#comment-322977 and continued on concerning the merits of Sergent couplers vs. Kadee semi-scale.  Since we were straying from the intent of that thread, I thought I'd start a new topic. See first reply below. 

You ever had that locomotive that when you found a picture of it, you were captivated by it's look and it's history. While doing research on the Texas Mexican Railway, I found a locomotive that did just what I have described.

After attending the Amhearst Hobby Show and finding a few good deals (this is one of them) on sound decoders, I will install one in a Bachmann GP30 that was originally DCC only.  This is a straightforward install and although it is somewhat step by step, I see it as an overview on how I do it.  This enging was one of those purchases I made when I was just getting into DCC.  The engine always runs very well but I knew that a quality decoder would make a difference.   Just getting around to it now and I hope to show how I do it!