Yes, paperport will insert a signature image. You could also use adobe photoshop if you already have that software. I also confirmed that CutePDF Professional stamp image tool (this is cheap and a small step above the free CutePDF writer).
First thing, you will need to print the script from AC into a PDF format. Use the free CutePDF writer that I talked about in earlier posts(just do a search on old posts for the link).
Then, just send the file via fax.