adding First Name and Last Name to multisite site-new.php

we are using multisite to give new store locations a personalized site.
in the intrest of saving a step… is there a way to add the First Name / Last Name fields to
“Network Admin >> Sites >> Add New” Form?

as i understand it, those fields do not exist until after the new blog is created. so i assume there would have to be a 2nd action to update those fields AFTER the new blog is created?

Sean