Owncloud logo personalization (ESX .ova installation)


I have some problems with the personalization of the web interface of owncloud.
I’ve installed the ova ESX version downloaded on the owncloud website.

In this version I can’t find the img folder to sobstitute the owncloud logos with mine.
Checking the paths described in the owncloud guide is not present the folder owncloud/core/img.

In this version there is an alternative path for the images?
Please let me know.
Best regards

-Simonetti Salvatore
Padania Acque SPA