USB Keypad as a remote pendant/remote controller

I’ve just purchased a cheap usb numeric keypad for the xcarve. I want to use HIDmacros (or any easy alt program) to save number 9 (pgup) which is shift + arrow up, and number 3 (pgdn) shift arrow down to my keypad. the script code for shift on HIDmacros is + and trying to put in ++ sure a heck don’t work.I’ve been trying most of the day to program this sucker with no luck. Is there anyone out here (what a silly question) that might give a detailed explanation in simple terms so that I can achieve this? Thanks in advance.