you need winSCP or Putty or something like that...
You will then be able to SSH into the phone if you have OpenSSH installed.
Once both are installed, its simple..
You find out the phones IP address on your network. Once you do that you add that IP into the Host name...
Host Name - IP (192.168.XXX.XXX)
Port Number - 22
User Name - root
Password - alpine
File Protocol - SFTP (make sure "Allow SCP Fallback" is checked)
Also, before you do this...make sure you turn your auto lock feature on the phone off.
Good luck...
PS, if you have some cool .caf tones, let me know..im looking to replace mine, but i cant find any good quality ones. I want tones, not music as a new message tone.