Modification on ecard wordpress site

Hi, we need to have some modifications done on our wordpress site. Here is the job : - Allow 10 recipients maximum - error message when fields aren't filled correctly : Actually this error messages are managed via HTML5 validation, we would like to have the possibility to change them (spam check too) The box with error message will be in regard of the missing field (same line). - message box : limit to 3000 characters. - when the receiver click to the link to see his card : remove title of attachment in the page result Include a link to send another ecard under the attachment (wording and link will be given). -template ecard : center the ecard having the sender's name into the email subject. You will receive the url by PM