Power options in Windows XP

Boss wants me to find a way to implement the power saving option in Windows XP specifically for the hard drive option to turn off after 15 mins. He feels in light of our many recent hard drive failures on our Dell laptops if we give a break, that will help decrease failures. I notice that this option is user specific. We want a way to change it once and for all users. Anyone know of a quick and dirty way to do this? Much Thanks!