hey,
I have made a blastchat version which you can use without joomla (so just only php and mysql)
you can include it into your user system! So if a user goes to chat he hasn't got to fill in his guest username.
It also uses your own registered server!
what to do:
change config.php to your own details.
and include blastchatc.php where you want to have it

.
the admin script is admin.php and only checks if the user is logged in with the username of the admin (you gave in config.php).
if there are bugs, please tell me

AND READ THE README FILE FOR INSTRUCTIONS
need help?: ask here