There are several ways to set-up a system for dual boot. The best or preferred method is dependent on the operating systems involved, the particular BIOS code on the system, and on whether the file systems will need to be available to more than one operating system. Boot.INI is a text file, and so can be editted to suit, with notepad. Unfortunately, the way this question is worded, there is no way to make a direct answer on how to do it properly on that system.