Marketpress Import for optional/additional items

I have downloaded the sample xml/cvs file for using the importer to import external date into Marketpress Products. What I don't see or understand, is how to import the Variations.

For example I work with team sports. So Team A is my main product. then all of the individual games are the variations. Each game has it's own description (date,opponent etc...) and it's own SKU

How is this accomplished? I tried to locate the data base where the data is stored to see if I could figure out how to accomplish this but not sure where or how this is connected. I haven't really programmed much since the old x-base days so the verbiage is a little different. Please help as soon as possible.