You need a cvs client to access those files, for example:
http://www.tortoisecvs.org/
the repository you want to access is "cvs.limewire.org:/cvs" and the module you want is "limewire".
If you are using command-line cvs, the appropriate command would be:
cvs -d
server:guest@cvs.limewire.org:/cvs co limewire