Uploading PDF and IMAGE in same form

[eluser]bennyhill[/eluser]
In a product form, I have fields where a user can upload an image as well as a pdf.

I figured out how to have both files upload successfully to the same directory, but I would like images to go to an images folder, and the pdfs to a pdf folder. How would I change the upload path for the pdf in the model function? Let me know if I should post my code.