From a recent comment through ‘Visitor’s Wishlist’, Sheetal Asked about ‘How to add keyboard shortcut to add a modifier in Blender. So here is how:
Here is a blender 2.63 screen-shot. In the scene just select any object. Then Go to modifier stack in the Properties panel. Now open the ‘Add Modifier‘ list. Then ‘Right-click‘ on the desired modifier from the list, that you want to create a shortcut. A small sub-menu will pop-up. Click on ‘Add short cut‘ button, move your mouse on the ‘press a key‘ link area and just press the desired shortcut key (or keys)
That’s it. You just added a brand new hotkey to that modifier.