Yes, IMHO CGI.pm is the best way to process forms - it was written by Lincoln Stein (http://stein.cshl.org/~lstein/), has been around for a long time so is very mature, and as Dean said it's been included in the standard perl distribution since perl version 5.004. I'm guessing since you refer to WS_ftp that you are on a Windows machine - I can't be much help there. If you can get to a command prompt, you should be able to do
to read the excellent documentation included with the CGI.pm module. The CGI scripts you write will need to exist on the webserver machine which is where they will run.
Just so you know, the CGI.pm module can be used for much more than just processing forms - it provides shortcuts for printing out your entire HTML page. I prefer to use it for just processing forms data myself - I like to code my own HTML because I feel too removed from the HTML if I use CGI.pm's shortcuts
HTH.