If you dual-boot your computer with Windows XP and anotheroperating system, yousee an operating system selection menu on startup. If you typicallyboot into WindowsXP and not the other operating system, you can speed up the dual-boot timeout valueso that you do not wait so long for the boot process to select your default operatingsystem and continue with the boot process. The default timeout valueis 30 secondsbut you can change this setting to 10.
This gives you enough time to select the alternate operating system if you want but also speeds up the boot
process. You can skip this section if you do not use a dual-boot configuration.
Follow these steps:
1. Locate the boot.ini file on your computer. It is a hidden file by default; mine is located in C:\boot.ini.
2. Open the file with Notepad (which is what opens it by default).
3. Change the Timeout value to 10.
4. Select File/Save and close Notepad.
"Windows XP Tips: Speeding Up the Dual-Boot Timeout"
Reference : techpraveen.com