Boot.ini is the file that is the loading sequence for Windows. If moving from Windows ME/2000/98/95 to Windows XP, if you want to boot to a Linux partition without using a Boot Loader or any other reason you want to modify the Boot.ini file... this is how.
CAUTION: Modifying this file without proper knowledge will render your computer UNBOOTABLE, proceed with extreme caution.
Way #1.
In Windows Explorer (Right Click START button click EXPLORE or WIN/E) right-click on MY COMPUTER. Choose PROPERTIES.
Click the ADVANCED tab
Click the SETTINGS button under the Setup and Recovery section
There you will have a dropdown box of all the operating systems on your computer (and in the boot.ini file) which for most people is usually one.
If you click the EDIT button, that will allow you to manually change the boot.ini file!
Way #2
In Command Prompt (Start/Accessories/Command Prompt) type in
c:\boot.ini /sh
There it is in Notepad ready for you to edit!
/sh is show hidden.
Yes folks boot.ini is in the C:\ folder and you never knew it!
To show boot.ini (NOT recommended)
C:\boot.ini +s +h
To NOT shwo boot.ini
C:\boot.ini -s -h
Happy Computing!