inifinte duration defined in a list attribute?

[Shannon M Tubridy]

Hi all,

I'm hoping to set up an experiment in which the same slide event varies 
between a timed and infinite duration but I'm having trouble getting 
the event to accept "infinite" or "(infinite)" as acceptable durations 
specified in a list.  

I realize I could put a long duration value into the list in the hopes 
that subjects don't wait too long during the event, but if possible I'd 
like to specify a genuinely infinite duration.

Thanks for you help,

Shannon Tubridy
Davachi Lab
Department of Psychology
New York University
6 Washington Place, 8th Floor
New York, NY 10003