Comments on cpanel guestbook programs

Hi,
I am currently using cpanel and from what I can see is that they have two
built in guestbook scripts ipeguestbook and advanceguestbook. I
tried to search on the web for some more info but nothing. Does anyone have
a website for these two or if someone has actually used them what type of
pro's of cons have they had.
I would like something where if a person is abusive I can block them out or
have some control of the guestbook.
Thanks for your suggestions.