1. To hide this template to change the hidden parameter and set this parameter to True. By default it is set to False.
2. If you want to change the title there is a parameter called title.
Same way you can change the description, order and images.
This file is located at at Local_Drive:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\TEMPLATE\1033\XML
Attempt A Question on Site Template: Question On Site Template