I found another alternative for viewing many images files on the pocketbooks. And although the IQ 701 states that it can read jpegs, it doesn't really seem to.
A simple way I found was to convert the many image files into a djvu file. Initially I tried PDF, but PDFs are more resource intensive than djvu files to read, and the IQ 701 was grinding to a halt on big PDFs.
I'm sure there are many conversion programs on Windows, but as I use Ubuntu it was a bit harder to find a proper GUI conversion program. But...I did find one...
Its called gscan2pdf. http://gscan2pdf.sourceforge.net/
It can convert any type of image file(s) to a PDF, djvu, or other formats.
For me, this was the easiest alternative to convert comic book image files to something that the pocketbooks could read effectively.