Script to Maintain Audio Output Volume on Restart?

Hi. I have four mac minis in kiosks around Miami. They’re set to restart automatically after a power failure. I’ve noticed, however, that when they restart in such a situation, the volume in the System Preferences is lower than what I’d set it at previously.

I guess there’s some sort of volume level it defaults to. Does anyone have any ideas on how to change that?

Thanks!

Model: Mini
Browser: Safari 533.19.4
Operating System: Mac OS X (10.6)