I was asked the other day how to play r00 r01 r02 files. This is definitely a case of "in the land of the blind, the man with one eye". Back in the early days of file compression when we only had floppy disks. The first popular ones were limited to 360k and there was the need to both compress data and span a large file across multiple disks. Even a few years ago, large programs needed multiple disks rather than the now common DVD. There were several formats which achieved this: cab, and rar were just two. The zip format also supported spanning across multiple disks. The rar format would store its files in r01, r02, r03 etc (possibly up to r99) files of specified size which would fit on the desired portable media.There is a public free utility called 7z (short for 7zip) which is downloadable here . This will decompress rar files and restore the original format and file names. Most often these days this will create an avi file or other large data file. If you need to play an avi file then the video lan codec is probably the most popular and versatile free media player available. The VLC player is available here.
So now you can play those r00 files. Of course its always advisable to scan the compressed file to see that there are no viruses inside first.