Have a look at http://www.google.com/search?q=convert+pdf+jpg
I don't have any experience with any of this shareware tools, so I can't give specific advice. The general advice: try before you buy!
The alternative: ask your relative to send you a cd with the original pictures as they came from his camera. That's jpg. He went through some work to convert them to jpg for you.
Hope this helps.
A relative sent me a cd with pictures, but all are in PDF (Adobe)files. Without going to great expenses, how can I convert the PDF to JPEG files?