Hi Shachar,
You can take a look at the virttreegrid ( \syncfusion\EssentialStudio\5.1.0.22\Windows\Grid.Windows\Samples\2.0\VirtualGrid\VirtTreeGrid\) browser sample for one example of minimal tree cells in a grid. And also refer to the below forum thread for more details.
http://www.syncfusion.com/support/forums/message.aspx?&MessageID=55615Best regards,
Haneef