1. I'm using Ecotox 3.1 and I used the ES File Explorer to do this. This is a definite improvement to scrolling for me. Of course, you lose volume switch for the page flip in Aldiko and presumably FBReader. 2. You can't change volume with these keys without reversing the key assignment. There is already a volume adjustment at the top of the Menu screen that works well and you can always mute by long-pressing the Power key. That works fine for my needs. Perhaps someone more knowledgeable could set it up so that the key can be used for scrolling with a short-press and volume with a long press. Or a screen toggle between the two?Meanwhile, thank you razvanesq, I think this really helps.-- dinnty