register, the majority of users are simple users, they don't know how to do that, anyway you did a great job posting that clip. If anybody with Windows had troubles removing .mpg extensions, only follow these directions carefully:
You have to delete the .mpg ending at the end of the filename of each part. Just rename them and delete the .mpg. If it isn't showing up, look up at the top of your screen. Click "Tools," then "Folder Options." Under "View," UNCHECK the box that says "Hide Extensions from Known File Types." You should then be able to see the .mpg, rename the file, and delete it.