.. or use an iFrame. In the parent window, check to see if the file input is not blank. If it isn't, submit that, first, then the rest via AJaX.
If anyone knows of a website that can offer ColdFusion help that isn't controlled by neurotic, pedantic jerks* (stackoverflow.com), please PM me with a link.
* The neurotic, pedantic jerks are not the owners; just the people who are in control of the "popularity contest".