How do you make custom forbidden pages? I've seen them from somewhere before....

you can add any type of error page to your .htaccess file, in the same format as the 404 code that Lissa has.

in the code:
ErrorDocument 404 http://www.yourdomain.com/error.html

just replace 404 with the appropriate number- for example, i believe forbidden page is 403, so your .htaccess file might have:

ErrorDocument 404 http://www.yourdomain.com/error404.html
ErrorDocument 403 http://www.yourdomain.com/error403.html

Okay, thanks very much :) .