How Can I Change Open Office File Extentions to Save For Windows?

I recently downloaded Open Office Suite with every program. I was very please and impressed by their programs. Their like the mirror image of Microsoft Office. I didn’t like the fact that it didn’t have a program like Outlook, though I have Mozilla Thunderbird. But my question is, is there a way to have everything I create (word, presentation etc) automatically save as a Word or Powerpoint file? I want this because I do work for school and my school doesn’t have open office so every time I use my flash drive to open a document created by open office it doesn’t work. So can I just change is so its Word and Powerpoint even though its Impress and Writer! THANKS!
I basically want to have the file extension change by auto!