I've managed to solve the N/A text boxes the easiet but the most time consuming way - just by putting a rule on a button, that determines whether the field is blank, and sets its value to "N/a".
Now, there is just the page break issue left. I've tried almost anything, but with no success. Looks like the default printing functionality of Infopath even page breaks the texbox control, if there's more than one row in it. Arrgh.. :(
I've also tried to use image as a background for table, to group the signature section (Expression box) with a repeating section of text box controls. Nonetheless IP moves the image to a new page, and breaks the controls in section apart, leaving one box on the one page, and all the rest - on the other.
Is there a solution or workaround for this, or this cannot be done?
Any help or ideas regarding this page break issue would be very appreciated..