Adding extra fields in contact page

Hi everyone,

I tried to add some extra fields in the contact form to be sent by email.

I'd like these fields to be shown in the email body, I saw in the contact.php file, setText() method which by default take the enquiry to create the message body.

I'd like to add my extra field in the message body.

Thanks for help,

I'd also like to manage an attachement file to be sent to the store admin.

Any ideas ?