Way to reset timing for Idle Full Scan?

I have my Idle Full Scan set to weekly.  So it's now running every Friday.  Short of leaving the computer off all day Friday, Saturday and Sunday, is there any way I can "reset" this to run Mondays instead?  If I wait until Monday and then start an Idle Full Scan manually from Norton Tasks, will that "reset" the timing to Mondays?  If not, does anyone know of another way I can do this?  For reasons I won't go into here, I want to stick with Idle Full Scans instead of setting up a Scheduled Full Scan, so that wouldn't be a solution.  Thanks.