I have several clips taken on different camcorders of a wedding day. However some are shot in widescreen others are fullscreen. Has anyone any suggestions how I could make all clips widescreen ie black line horizontal on top and bottom of screen. I have tried a few options however the full screen shots are creating black lines all round the image and widescreen is just fitting into the center of screen. ( I want the whole video to be the same)

I only have windows movie maker or Ulead VideoStudio SE DVD available to me.

Any suggestions??? Help would be appreciated . .