No Problems, yes from the top of my head this is possible as the amount of presses detected is done at driver level as opposed to the hardware capability, someone please correct me if i am wrong, some psuedo programming may need to be done in ETS and the original button function may need to be instigated in composer. When i get a chance i will check this out in some of my older projects, i know i have certainly done this with other brands of KNX keypads.
Best
carl