ive never worked with jpegs as the source in premeire, but i suppose you could import the jpegs (there may be a way to import them into the timeline numerically based, i dont know ...
but might take some dicking around to get it to work and the best result.
There is a wealth of information here:
www.dvdrhelp.com
If you dont find an answer send me an email to mb at 219inc dot com, my brother is good at finding solutions for these sort of things and he is familiar with all the lesser known programs like gordian knot (sp?) and others.
There has to be a way to do it, not sure how the final result will look like, but seems you already accept it wont be perfect...