How to migrate my current members to amember pro

I have a custom member script and a current database of members that I'd like to upgrade to use amember instead. Can anyone help me figure out how to do this?

Here is my current data structure dumped from mysql:

CREATE TABLE members (
id int(10) unsigned NOT NULL auto_increment,
username varchar(20) default NULL,
realname varchar(50) default NULL,
email varchar(50) default NULL,
password varchar(20) NOT NULL default '',
encrypted_password varchar(30) NOT NULL default '',
member_since datetime NOT NULL default '0000-00-00 00:00:00',
expires datetime NOT NULL default '0000-00-00 00:00:00',
PRIMARY KEY (id),
UNIQUE KEY username (username),
KEY useridx (username)
) TYPE=MyISAM;

I will be using amember pro. Thanks for any help.

Tom