The photo may be submitted electronically in .jpg format, it must still meet the other requirements, i.e. be a typical profile photograph of yourself where you are the subject and clearly identifiable, and not electronically altered to misrepresent yourself.
The signature can simply be your name typed at the end of your application, certifying that it is you submitting this application.
"The devil I'll bring you," answered Hagen. "I have enough to carry with my shield and breastplate; my helm is bright, the sword is in my hand, therefore I bring you naught."