Try Media Coder [
^], it's open source and free. You have to set audio to "No audio" with these clips or you'll get an error.
If you can't get this program to work, then use Real alternative [
^]. It's "Real" without all the bull, and you can view any Real content.
Winavi will let you to convert rm,ram files without problems if you have Real Alternative. (it's not free).
Similarly for Quicktime I use Quicktime Alternative [
^] instead of the one on the Apple site. It's clean of any programs and funny things.