Yes I have seen that script. I have two problems, first is I didn't pay enough attention to my french in school (and seeing his outlines it kindles the geek in me, shame the the understandiing is greek to me ).
Second I want it to be smooth for my coworkers who will be implementing the nitty gritty, and I want it to be workflow proof. I am sure Marc could modify his script to behave as I would like it but if I am to do it myself i need more guidance.
Most of the barcode scripts depend on a frame being drawn and selected raher than selecting a number string, wich is as I se the natural grammar.
Selected text string (number, or GREP findable string) gives barcode according to configuration at specific anchor point. Where the configuration would include if the selected text is to be replaced or preceded/followed by barcode graphics (as well as size and style of barcode)
Excuse the syntax, been a long 20 years since I typed code and am now much more a user than a programmer.
I've seen barcode generators discussed in different forums, I'm sure that you can google yourself into them. Whether they're any good I don't know.