[expert] Giving POP3 user FTP access

[James]

I have a situation where I have given a user POP3 *only* access through
using "linuxconf".  Now I wish to give the same user FTP access as well.
Do I need to delete his "Special account" then create him all over again?
And if so, how do I give him POP3 access as well as FTP access to his own
directory on my server?

Thanks.

james