drop down menu from a file

We have a page that needs a drop down menu that contains roughly 50 options (we'll probably break that down into 3 menus, but isn't an issue for this question).These options may change from time to time, rather than needing to go in and re-populate the fields, then republish within Lectora, we were hoping to have it read the options from a txt or xml file.Has anyone come across this? I can't say I'm having much success finding a solution even with google so any help would be appreciated.We use Lectora Publishing 2006 w/SP4Cheers, Cam