How to install Coolreader?

Hello everyone

Does anyone know how to install Coolreader on Kindle 4?

the truth is that I have not tested it and I would like to do so. The Duokan have been tested but I am not convinced by the large number of Chinese symbols coming out there... even in the setup menus.

For Coolreader, Is it necessary to jailbreak and install launchpad? in that case, I would need all the files needed to make the entire process.

Thanks and regards