>     I don't know if this is the proper approach for what I need to
> do: the user is limited to use up arrow and down arrow for travelling
> into the list of options (maybe pg-up and pg-down for scrolling) and
> 'enter' to select the highlighted option. The program must process a
> text, present a list of options containing the text that matched
> certain regex and allow the user to choose one of the options.

why don't you use dialog for that ?
I may be wrong, but i think it already implements all what you need
-- 
Pierre Habouzit
 
http://www.madism.org/