Hi, because Photoshop has a lot of default hotkeys, leaving the user with little or complicated options for defining other custom keyboard shortcuts, I've made a little UI Script for Photoshop, inside witch the user can create custom buttons with their own keyboard shortcut that can trigger some actions or scripts.
Here is a video to explain it better:
https://www.youtube.com/watch?v=2_x1LerZfek
You can download it here:
http://buliarcatools.blog.fc2.com/