DP compatability

Hi all
running hog4pc the other day thought I would use a hog3 (3.26) dp8k
needed to upgrade it to H4 1.2
now it wont work with the hog 3

I thought there was a way of using the dp for both
as this dp will jump between a h4pc system and a hog 3 console
bit boring to keep re flashing the image
m