Sure it is. However, please post questions like these into the Support forum as it will get many more voices and much faster response rates.
There are a few different ways, actually. The easiest would be to go to your Graphene options panel, under the “Advanced” tab, and in the action hooks menu.
Click “header.php” and choose “graphene_header”, and save. Now, go to your widget menu, and you will see you have a new widget area labeled “Graphene Header”. Move a text widget over to that area. Inside the text widget, insert your image html code. Something like:
<img src="ABSOLUTE PATH TO YOUR IMAGE">
Next, if positioning is needed, use Firebug or it’s equivalent to inspect the area, and you can adjust it’s positioning using custom CSS.
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