Script Download:ChangeNumberOfAppsTileRows(VBScript).zip
http://gallery.technet.microsoft.com/scriptcenter/Change-the-Number-of-Tile-cd9bcc1a

This VBScript shows how to change the number of tile rows on the Start screen in Windows 8.

By default, the number of rows for the tiles is fully dependent on the screen resolution or window size that fits on your Windows Screen. But sometimes the user wants to display a specific number of rows of tiles on the Start Screen that is not dependent on the screen size.

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You can find more All-In-One Script Framework script samples at http://aka.ms/onescriptingallery