I just said, import it.. Using the Resource Manager. Just make your own image (320x240), go to the Resource Manager, and import it. Then you'll be able to select it in the list when you change the title/game over screens.
Resource Manager is under Tools. Make sure to click on the Title or Game Over folder (whichever you're importing.)
err no imean if i already saved the title screen can i put my own title...my own words like the title of my game onto the title screen i saved or the default title screen it doesnt matter