Cinema 4d - horizon and rendering question

In Cinema 4d, i am opening and editing a third party model. There is a "horizon" or some black bacdrop that appears on rendering (see http://www.eastongsl.org/bug.htm) . How can i delete, disable or edit color so i can render against white.

Also - how can i render to PSD - will it have layers? I see the setting but render only renders to screen not to the selected output file.

Thanks!