This is probably quite off the wall LOL

I am starting off a monthly special run of Daily Downloads...these will be set up in their own category as individual products consecutively added for each day of the month.

I had planned on just enabling the day's download each day....but I wonder if there is a way I can set up a cron job to do it for me...i.e. to disable the current product in that category and enable the next one in the list....is this possible? And if so, exactly how would I do it?

Thanx :)