Yes, You need to edit the CGI (the guestbook.pl) in order to modify the appearance of the entries. The thing to understand here, is that guestbook.pl actually edit's the html file that contains the guestbook entries. So, guestbook.pl opens the file polguestbook.html, and reads everything that's in it, into an array. Then, it modifies the information in the array (it adds a new guestbook entry), then it re-writes polguestbook.html back to the disk. If you want to try a little experiment, load the guestbook web page:
http://paulowenlewis.com/guestbook/polguestbook.html, and then right click on the page and view page source. Hit F3 (find), and type in --begin
that's where the CGI (guestbook.pl) actually starts making changes to the file. In the CGI, search for: # Open Link File to Output
Everywhere below that where you see:
print GUEST "whatever in here";
is actually where the entries are being added to the HTML file. So, you can modify those lines to contain fonts, tables, or images. This line, for instance:
print GUEST "<b>$FORM{'comments'}</b><br>\n";
is where it actually writes to the HTML file, what the user typed and submitted. So, you could remove the Bold tags, or add italics, or whatever you want in order to make it look the way you want it to. Let me know if this helps, or if you need further assistance.