slide background

Is there a way to change from the black background with white text to white background with black text in the slides?

You can import a solid white image as your background, then switch your text to black.  This is a good site to find solid color images at: [url=http://www.solidbackgrounds.com/]www.solidbackgrounds.com[/url]

Is it possible to have images as backgrounds i dont just want to change the background for the whole presentation. I want to be able to have a different background like in powerpoint. Should be able to do the general announcements without the need for powerpoint.. so that I dont have to queue that all up in a bunch of different queues.

cues*

When creating a slide, create a media box that fills the full slide and select the desired video/image for that slide's background. You can right click and choose "Send to Back" if needed.