Vlasovsoft is a program that can permit installation of reading apps and other apps to a variety of eBook readers.
The link above provides installation data in English. This is a framework OS addon to provide the necessary hooks to extend the capability of eBook devices. Note that this can be complicated and no guarantees that the unit will work properly. Use at your own risk. They do have a support forum available.
Using the site-map link to find all of the pages.
 Supported platforms
- iPhone, iPad, iPod Touch
- Linux - be sure a pick 32 bit or 64 bit archive.
- Amazon Kindle - needs KUAL