InfoPath Dev

Not quite what I had in mind.  The number of files on each infopath form generated from this would be different each time in all likelihood.  The users would need to be able to select as few as 1 file, or as many as the form will hold, or any number inbetween.  Basically, I want them to be able to choose a file from the document ...

I haven't found anything that addresses this specifically and I'm not sure how to do this. I have a SharePoint (MOSS) Document library that I need to get information from.  Specifically, I need to be able to select possibly 20 items from this library, that could potentially hold hundreds of items.  In order to prevent user error ...