I'm wanting to add some additional processes to the client addition process that Plesk provides. Where can I hook into the Client setup process to kick off my scripts?

Basically, I'm just wanting to kick off a couple scripts that I've written to handle additional setup needs. I need to pass them the client's name, email, etc... I would like to do this after entering the information in Plesk, just need to know what's being called by Plesk so I can hook in somewhere.

Thanks,
Mike