You can use the program FRAPS to record R4.
If you choose v.1.9 of FRAPS you won't be able to record sound, and the resolution must be at 640x480.
If you coose FRAPS v.2 you will need to donate money in order to use the full version or else all yoru videos recorded will have a watermark on them, and only be able to record at half size. Plus you can only record 15 second sections, and must wait an additonal 15 sec to record the next part, if you don't have the full version of FRAPS V.2, that is.