i wasn't able to burn the .rm file directly in nero...so i guess you'll have to just convert it into any other format like .avi, .wmv or mpeg? don't think mkv can work also.
i do have a program that i have used to convert from rmvb to avi before.But its realtime recording which means it plays the file(with no sound) and records as well.Maybe you would like to try it.PM me
I'm not sure if Super can do it. But it's great and it's free so you should try it out anyway.
Allternatively, there was a converter I came across a few years back, called TINRA (this is not real anymore). Maybe you could search for it an see if it works with the version of real you have.