Update here - Psychboiler's suggestion of combining the IAT and GNG into one questionnaire, using different RGB values for each, seems to be the only way to get it working the way I want. I was doing it correctly before (using RBG in the exp file - since there were more que files than just the IAT and GNG in my experiment), but I couldn't get it to work. And User2000, the skip values all looked fine. So for now I'm going to go with combining them, as that seems to work. Thank you so much User2000 and Psychboiler for your assistance, it was much appreciated!
Marie