how to: insert items into a drop-down box using transcript

[Emilio Gagliardi]

Greetings revolution programmers,
I hope that someone can point me in the right direction of some 
examples or tutorials that demonstrate how to use transcript to add 
items to a drop down list based on some variable.  For example, on 
PreOpenCard reads the directories where the application is currently 
loaded and then generates a drop-down list with items that match the 
available directories.

I've flipped through Dan's book, the documentation (which appears to 
not have any code examples), the online tutorials, and google and not 
found anything.  Any help is greatly appreciated.

Many thanks,
Emilio