AS2 - xml files help

I have a quiz that has categories. The questions for each category are in separate xml files. When the quiz movie clip ends after 10 questions it goes to the results page where there is a choice to replay the same category or go back to the categories scene to select a different category.

Where I am stuck is how to get the applicable xml file to load. So say for instance the geography button in categories loads the quiz scene using geography.xml… the science button in categories loads the same quiz scene using science.xml etc etc.

Whatever I’ve tried (duplicating and then renaming the quiz scene, copying the frames in the quiz scene into frame 2) just causes the quiz to load the next xml file without stopping after the 10 questions and then going to the results.

Total noob here so would appreciate any help.