Replying to Question about converting files????????

I have a sony handycam dcr-dvd105 that burns to the small dvd's. So when i finalize the disc and stick it in my computer to take the video's off, i cannot take them off because they are in the wrong format. Some are IFO format, VOB format, and BUP format. These files are not recognized by windows movie maker or anyother dvd burning program on my pc. I can play the video in windows media player, but cannot burn out of it. I have a macbook laptop and i want to burn a full size dvd of the video so that i can use imovie to edit it. The small dvd's will not fit into the drive.
I want to convert those files into mpeg files or some file i can use in imovie, or windows movie maker.

Has anyone had this problem and know how to fix it?
I read online that you could simply change the file name but i dont know how.

Does anyone have any advice?

Thanks for your help.