Great article, personally I use DTS primarily through VB.

I design the package in EM and save as VB then edit it in my editor and assign Variables to the values I want to do progamatically, it works great and allows me to use DTS for high quality and speed issues in the tools I create.

however, the concept of using Global variables is an excellent Idea, and I will start designing my new DTS packages with that in mind. (it is so much easier than browse down the code and look for all the relevant places...