Start up with the OS you choose with this PC hack of the Windows boot loader

By completing a successful hack of the Windows boot loader file, you can specify which operating system and configuration you would like to load during the boot process.

Many power users, IT professionals and network administrators need to have different operating systems available on the same machine. Multiple operating systems are often required for testing purposes—login scripts for example. Having more than one operating system on the same PC makes a busy IT pro's life just a little simpler. This downloadable hack from PC Hacks: 100 Industrial-Strength Tips & Tools, by Jim Aspinwall, shows you how to edit the boot.ini file located in the Windows root directory to allow more than one bootable operating system on a single PC.

Title: PC Hacks: 100 Industrial-Strength Tips & Tools
Author: By Jim Aspinwall
Publisher: O'Reilly Media, Inc.
Hack 94: Hack the Windows NT/2000/XP Boot Loader
ISBN: 0-596-00748-5; First Edition October 2004; Copyright 2005
Web site

How many operating systems are bootable on your PC? We've seen a PC that could boot 8 different OSs, can you top that?