In CS3 (and prior versions) there was an option to encode to realmedia. I can't find that choice in media encoder in Premiere CS4. Other places to look or solutions? I have searched (the web, adobe.com, and forums) to no avail.
I don't think it was actually spyware, but not too far from it. It invoked pop-ups at an unbelievable rate, and had a way to get past most of the pop-up blockers of the day.
As for using it, I'm with you - not on your life. There are several players out there, that handle the .RM (and .RAM, IIRC) files, but I have not seen one of these in years. Think VLC *might* be able to play them.
You might not have much luck. Why do you need to convert to .RM? Is there not a better format that you can use, in lieu of that one?
If it has to be .RM, I believe that the full-paid version of RealMedia Player could convert some file formats to .RM. Been so long, my memory might be horribly foggy. However, I feel that .RM has been dead for many years.