I really like vlasovsoft CoolReader version. It's cool

How can I setup CoolReader as my default application for reading fb and epub files ?
How can I add Open With Context Option ?
At the moment I start Launcher, click CoolReader and open book manually.
My device is PocketBook 740 / Inkpad 3
I use this: http://pbchess.vlasovsoft.net/files/pbc ... obreey.zip