windows movie maker is a good choice for you. but windows movie maker (media player) can accept AVI and WMV format, so you can try to convert your DVD movie into AVI. I always use this easy and free tool called Leawo Free DVD to AVI Converter. I think it must can help you.
http://www.google.com/search?hl=en&q=leawo+free+dvd+to+avi+converter&aq=0&oq=leawo+free+dvd+t&aqi=g3it is a professional dvd to avi converter. it can convert dvd movies into AVI, MP3, M4A, AAC, WAV, etc. and this converter is completely free one, with no limitation and no watermark. and here are some steps:
1,open the program, and insert your DVD, click load DVD to find the video you want to convert.
2,setting. choose the AVI as output format, and the folder you want to save your AVI video in. Then set something you can find on the program, like merge some clip into one.
3,click start then wait till the process finished.
4,when you got the AVI video, you can edit it in Windows movie maker. i think this guide must can help you too.
http://search.yahoo.com/search;_ylt=A0oGkiXNakhKQUcARydXNyoA?p=site%3Aleawo.com++user+guide+free+dvd+to+avi&y=Search&fr=yfp-t-106&fr2=sb-top&sao=1