You don't need a transmap for transparency. You only need a transmap if you want variable transparency, i.e. some parts are more transparent than others.

When you say you don't want to use the mat room nodes, you mean not even the root node? Because all you have to do is set the transparency between 0 and 1 on the root node to get semi-transparency.
 
And what do you mean about transfer to DS? You mean you expect DS users to use your Poser material files, instead of giving them DS materials? And are you sure the root node transparency doesn't work for DS? Meaning, did you try it?

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)