pear wiki

I am trying to install the pear wiki filter, but I am not understanding this part of the readme instructions:

Use the following command to get the CVS Version of all the required PEAR packages
(which I would recommend at least for the Mediawiki parser):

cvs -d :pserver:cvsread@cvs.php.net:/repository checkout -d Text pear/Text_Wiki/Text

Any help? I think it means to use some sort of command line, which I am unfamiliar. Is there a way to do it without it?