Using the debug commands on the search bar, you can create launchpad-like functions on K5. You can create a new debug command such as ".XY" that will execute any .sh script you want. Please see the post
Also, you can make the Kindle Store button execute an application or set a parameter with one action. I found this to be the easiest for an action that I perform many times as it requires only 1 or 2 taps. You can also make it perform different actions with each tap.
Please see the same post as above.