As you may be aware, the local administrator account is disabled by default in Windows 7. MDT 2010 re-enables it and resets the password. This is initially done when you create a new task sequence so you don’t really need to type it in every time during the Lite-Touch Deployment wizard.
You can skip the Administrator Password wizard page by using this property in the customsettings.ini.
You can also override the admin password for all of your task sequences by using this property in you customsettings.ini.
Or you can set it per Task Sequence as a Variable. Handy if your security manager tells you to start using a new admin password immediatly as there’s just one setting to change.