Form with custom file name upload

I need to create a form with custom file names for files uploaded to a directory on the server. I want uploaded file names converted to lastname.firstname.datestamp.photo1, .photo2, .photo3, and .resume.

I have this registration form in html with formmail.php, and it does this, but I can’t seem to find a plugin that does this. I also need the form to write the records to a csv file I can download and import. Once I import the new records, I download the photos and resumes and attach them to the database records. That’s why I need to have custom names on the uploaded files.

Is there a good solution for this?