install a copy of unrar (this might be the latest version, not sure: http://www.tucows.com/get/8753_32608
), then go to the directory and unrar the files like this:
$ unrar x <filename.r00>
or whatever is the first file (without the arrow brackets
). then unrar will go through the directory and extract everything into one file. once the file is extracted and you have verified that it works, you can delete all the *.r00 files.