[support] module to change node owner

Hi all,

I am searching for a module which allows admin to change the ownership of drupal node. My requirement is something like this, I am working on a project similar to linkedin.com where users can register, create a profile and share it with other. Here the profile is a CCK node (with some fields restricted to users based on roles) implemented using content_profile module. Sometimes admin has to create a profile node for site users. When the user registers in our site, he should be given a link where he can make a request to takeover the ownership of the profile node. Is there a module exists for this ? Any suggestion pertaining to this will be greatly appreciated.