CFDocument question

I have an application in which users enter information into a form, and then have the ability to output the resulting document to PDF.  I have this all working perfectly using cfdocument, with one exception: there's supposed to be an approval signoff section at the bottom of the first page.

The problem is the resulting document can be 10 to 15 pages long, and there's no way to accurately determine where the first page is going to end (there are several text boxes that allow users to type in an unlimited amount of text).  My first thought was to put the signoff section into the footer, and use the evalAtPrint attribute to only print it on the first page. However, the signoff section is too big to squeeze into the footer without increasing the bottom margin, and the only way I know of to have different margins on different pages is to use cfDocumentSection tags.  The problem with that is a page break is inserted at the end of the section, and because of the unlimited text boxes, there's no way to tell what should be in that first document section.

Any ideas on how I can make this work???