Converting Help!

I have recently downloaded a few .rmvb movie files. They are 7 English Dragon Ball GT episodes. I have wached and played them all on Real One Free Player and they have worked perfectly. But now comes the process of converting them to a file format that can be burnt. I was thinking of converting to .avi then having some other program like TMPGenc or Nero convert it ready for burning. Does anyone have any other solutions and does anyone know were I can get a tool to convert .rmvb movie files I have TMPGenc which doesn't want to convert these files and Nero cant seem to read the files for some reason! So does anyone know were I can get a tool to convert it?

B-U-M-P
Sorry for bumping but it has nearly gone to the third page with only three views :'( I need some help on this does anyone know how I could do this please.