These articles explain how to view and manually build up the Boot.ini file in Windows XP from within the Startup and Recovery dialog. The boot.ini file is an easy text file that is on the root of the boot drive. You can easily set the Boot.ini to verify and/or edit the file.

Please back up the Boot.ini file before you edit that file. The first step is to modifying folder option so you can look into hidden files and then back up the Boot.ini file.