Disabling disk checking

My PC is not supported by a UPS and our power supply fails frequently. When there is a power failure my windows XP is not shutdown properly and when I reboot, XP starts checking HDD, forcing me a to waste a lot of time everday. Though Microsoft discourages us from doing this, I would like to disable chkdsk on my PC. Is there a registry hack to achieve this? I would be very thankful if you can help me with this problem.
Kavi Rama Murthy