Ich würde den MySQL Install Part anders machen:
[autoit]
;Startet Installationsprogramm
RunWait(@COMSPEC & " /c " & "Start mysql-essential-5.0.26-win32.msi /quiet /passive")
;Sign Up deaktivieren
WinWait("MySQL.com Sign Up - Setup Wizard")
ControlClick("MySQL.com Sign Up - Setup Wizard","Skip Sign-Up","TTntRadioButton.UnicodeClass1")
ControlClick("MySQL.com Sign Up - Setup Wizard","Next","TTntButton.UnicodeClass2")
;Beendet die Installation
WinWait("MySQL Server 5.0 - Setup Wizard")
ControlClick("MySQL Server 5.0 - Setup Wizard","&Finish","Button1")
;ConfigWizard starten
RunWait(@COMSPEC & " /c" & "Start 'c:\Programme\MySQL\MySQL Server 5.0\bin\MySQLInstanceConfig.exe'")