Custom Registration Fields / Database query

[Jwrbloom]

For the drop down menu, is it possible to include code from a query I use to create the menu options? I use it elsewhere for people to choose what school they represent, and there are 412 schools. I'd like to create registration settings where they choose how they found out about my site/product, then choose a school they represent.

I'm using it as a fundraiser, and if I could include my query, it would be easier to track it.