Changing search behavior of the Big NumPad on the Order Screen?

Is there a way to do that?

I frequently use the kbd to search product and I would like to use another input method(style) that I developed for my other software.

What other input method? What are you trying to do?

The method I designed is a blend between the Quick Input Method and 5 Strokes, but instead for Chinese, my method is designed for English.

Note: Quick Input Method take the first “character” of the words of a phrase/sentence while 5 Strokes take the first 5 sequence of writing a Chinese character.

I am trying to modify Samba to be used in wholesale and manufacturing environment where typing of product names is a constant non-stop task while taking orders or making quotes.

Can you explain a little more? Maybe show example/mockup?
By default the keypad entry needs to be entered to trigger an event.