I had same question, and there is no solution in mods forum.
In the register.asp only found
'If this is a new reg clean up the username
If strMode = "new" Then
'Check there is a username
If Len(strUsername) < 4 Then blnUsernameOK = False
'Make sure the user has not entered disallowed usernames
If InStr(1, strUsername, "admin", vbTextCompare) Then blnUsernameOK = False
If InStr(1, strUsername, "password", vbTextCompare) Then blnUsernameOK = False
If InStr(1, strUsername, "salt", vbTextCompare) Then blnUsernameOK = False
If InStr(1, strUsername, "author", vbTextCompare) Then blnUsernameOK = False
If InStr(1, strUsername, "code", vbTextCompare) Then blnUsernameOK = False
If InStr(1, strUsername, "username", vbTextCompare) Then blnUsernameOK = False
'Clean up user input
strUsername = formatSQLInput(strUsername)
End If
does anyone can help? many thanks!