The first column of buttons is the type of the application you are creating the script for. There are six options to choose from and the two selections in the last column can be selected in conjunction with the first four buttons. The first four buttons are 'Beta', 'Trial', 'Release' and 'None' which will indicate the release type of installation you are creating. The last two buttons are 'WinSxS' and 'Update' to indicate the type of release of the installation you are creating. IE. You can have a Release Major type along with an Update Minor Type.
This is mainly used to keep different deployments of the same development system from being confused and better maintained.
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