here I continue my question, I do have an app structure like this:

http://www.youtube.com/user/jamesshaw95#p/f/4/LBnPfAtswgw

and I want to add a startupview displays for 3 seconds at the app starts then disappear, then user will see the content.

but I am not able to remove the tabbar at the startupview, I want the startupview be a 320*480 picture which showing for 3 seconds then disappear, any help is highly appreciated!