Cron Job / Scheduled Task to change default style

[tfw2005]

I currently have a style/skin which pulls things from a CDN using replacement variables in the style.

This is not needed in off hours.

Could someone help me in creating a Cron Job / Scheduled Task to change the default style chosen in:

Vbulletin Options -> Style & Language Settings -> Default Style

From lets say styleid 1 to styleid 2 at a certain time.

That way, I can flip this on and off at a particular time of day when I know my traffic is low/high, save some CDN bandwidth.

Thanks!