I teach my trainees to do it the same way on the practical test as they would the day after. If your GPS is operational, program the approach, and use the GPS all the way to the final segment, then go back to GPS on the missed (but still set up the VOR's for the approach in case you have to revert in the middle due to GPS issues). If not, then just leave the GPS out of it completely. For example, if there are DME fixes, and you have a GPS but not a DME, then either the GPS is working and you use it as "normal," or the GPS is not working, then you play it without the lower DME stepdown and fly to the regular non-DME mins. I've seen too many people get balled up trying to do an approach as a mish-mash of GPS and no-GPS procedures.