programmer wing is hog3. running hog4. I want to use external button pad for the 12 command keys

my programmer wing is an old blue hog3 but im running hog4pc . I want to use an external button pad for the command keys. My friend uses a 24 button X KEYS unit on his ion so I was wondering if there is a way to that on hog as I described.

Very appreciative for any input :)

NEM