Here is what I am trying to do. I have an article of clothing I am trying to make it look semi transparent but I don't want to use a trans map.  I also don't want to use the mat room nodes for this since they are hard to transfer to DS.

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?

Failing that, if you want to use only the "simple" material room, i.e. the Poser 4 style materials, then use a gray image for the transmap. It doesn't have to be large - a single pixel will work.

When you said gray you mean something like this

or like this?

The first one. A transparency map is actually easier to think of as an opacity map. When the value is white, it is 100% opaque and you can't see through it at all. When the value is black, it is 0% opaque and is completely invisible. For any inbetween gray value the opacity is equal to the linear luminance, i.e. if it is RGB 128 128 128 then it is half opaque and half transparent. When it is RGB 192 192 192, it is 3/4 opaque and 1/4 transparent.

Since you said you wanted "semi transparent" and the definition of semi is half, I'd use RGB 128 128 128. But of course you may find that needs adjusting to suit you what you want.