You need to extract whatever is in the RAR first. You could have an avi, mpeg, or merely a cd image in the form of a .bin and .cue file. Use WinRAR to extract then post what kind of file you have.
i did that, i had a cd1 and a cd2. i then extracted the files out of these and i had a bin and a cue, one bin and cue for cd1, and a bin and cue for cd2.
Download ISOBuster. Get it here: http://www.smart-projects.net/isobuster/ This program will extract the mpeg from the .bin files for you.