If you dual boot your PC using Windows XP's dual boot process, you can reduce the timeout period your PC uses before booting to the default OS.  This tweak is useful if you boot to the default OS most of the time and only boot to the other Operating Systems on a limited basis.

1. Locate and Open the hidden file "boot.ini" in notepad or your favorite text editor. This file will likely be in the root directory on the boot partition of your "master" HD.  For example, mine is located in "C:\boot.ini" even though I have Win98 loaded on this partition and the  boot.ini file was generated when I loaded WinXP on "D:/"
    
2. Locate the line - timeout=30 (default is 30 seconds).  Change this value to any time desired.  I chose 10.  Be careful not to choose too low of a setting or you may not have time to select your other Operating Systems. Also, be careful not to change other lines as this may prevent your PC from booting at all.
    
3. Save the file.
    
4. The modifications you made will be in effect after you reboot your PC.