Rather 'off topic' for MyMPxPlayer.org but I'll try to help.
I've never had to convert a pdf to a jpg before but I did some research (Google) and found the following:
* Try this site to convert your files for you online and see how that turns out:
http://www.zamzar.com/
* Have a look at this article here:
http://www.online-tech-tips.com/comp...or-jpg-format/
Hope that is of some help.