AOL type signup

["StarDrifter" <strdrftr@ipa.net>]

Hello,
I was wondering if there would be a way to have a user to sign up for my ISP
using an initial logon in the format of AOL's username and password, such
as:

6P-9224-5150
GLAD-CARHOP

and then when they logon they can change their username and password, just
for that 1st time. After that they have to contact customer support.

Also, When the user changes his/her username and password it will record
that in a log and will be displayed at the end of the day.

Please help

strdrftr@ipa.net