How do I keep Windows Movie Maker from creating multiple movie clips from one imported clip?

Here is a guide that my friend and I wrote about how to install Windows XP. Enjoy!
I don't know your level of experience with computers, I will try to be as accurate as possible in the steps to take.
First you must take the obvious action of backing up your data and documents before you begin because everything will be erased afterwards. You can do this by either burning them onto discs or USB storage devices etc.

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These are just general instructions that might seem a little inexplicit. I wont go in-depth because there's simply too many things to state.
All you have to do to begin is to pop the Windows XP Disc into your CD-ROM drive, and restart the computer with the disc still inside. Now here's where I might have a problem in helping you, normally it will say press any key to continue, if it says that, great then do it. If not, your BIOS might not have the proper boot order, which means that the computer might boot from your hard drive instead of the CD. In this case there has to be a key to press that gives you boot options, such as the F12 key in Dell BIOS's (Its usually one of the F-keys). It will come up when starting of the computer.

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After choosing boot from CD-ROM in boot options, you will have to wait as the Windows disc loads and caches drivers and modules essential for the installation process, just looks like a big blue screen with words flashing at the bottom.
You will have to follow a set of questions by pressing the keys stated at the bottom of the blue screen to continue, such in the beginning when it tells you to press F8 if you agree with the license terms.

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Do this up until you come to a screen displaying your current hard drive configuration, stating all the partitions and what file systems each are formatted in
They will be in a rectangular box. If you computer is from a major computer manufacturer, you will have your current Windows XP partition and also a recovery partition.