One swf file to load different txt files?

Hi, I have adapted a quiz game to suit my own pupils.
They click on the topic and the swf file opens up ( I do not integrate it into my site )
It draws the questions and answers from an external txt file. I want to minimise the amount of storage on my site, so I want to make this one swf file be able to get questions from a different range of txt files depending which topic pupils choose.

Currently in the first frame it says

loadQuestions = new LoadVars();
loadQuestions.load(“spain.txt”);

Would I need to insert a frame in front of this with a selection of buttons which would refer to different topics. Then on this frame an if else kind of clause ? Hope you can understand the message and offer some guidance. lesley