RUN MORE THAN ONE WINDOWS VERSION ON SINGLE PC

Are you thinking about trying a new Windows version, such as Windows 2000 or Windows XP? It's possible to run two versions of Windows on a single PC. But setting up a "dual-boot" system takes a little planning and some technical knowledge.
If you want to run Windows 2000 or XP on a system with Windows 95/98 or Me, be sure to follow these rules:
You must have a separate partition or drive, with its own drive letter. Ideally, Windows 9X/Me should go on C:, with Windows 2000/XP on D:. Never, ever try to install two versions of Windows on your C: drive. Install Windows 2000 or XP last, after you get Windows 9X/Me working properly. Then, during Setup, click the Advanced Options button and check the I want to choose the installation partition during Setup box. After you finish setup and restart your computer, you'll be able to choose your operating system from the Windows 2000/XP startup menu. Want to install two versions of Windows 9X or Me on a single computer? If you want Windows 98 and Windows Me on one PC, you must use a third-party "boot manager" program to handle the work.