Add some functions to PHP Gallery images.

I have installed a php gallery script, and i want to add these functions: - add search engine. - display the added image date. - display the number of images added in the user page. (this function works fine in some page.) - fix sending mail function to reset the password. (the mail is not sent) - display the added images for each user in user panel. - allow registred user to send an email to another registred user. (email already registred in database)