[Plugin: Fast Secure Contact Form] use this form to allow users leave comments in entries

This plugin works well but I’d like to use this form in order to add entries in the post (comments).

When the user fills all the required fields, is there any way to add automatically to a entry (and not sending an email to admin)?

(I used SI-Captcha AntiSpam but didn’t work properly, so I’m looking other plugins)

Thanks!!

http://wordpress.org/extend/plugins/si-contact-form/