There is no way to increase the number of search results listed on the roSearchScreen. The recommended way of handling search is to display auto-complete results in the suggestions list, and show a new search results screen with all results when the user selects the "Search" button at the bottom of the screen.
My Channels: http://roku.permanence.com - Twitter: @TheEndlessDev
Instant Watch Browser (NetflixIWB), Aquarium Screensaver (AQUARIUM), Clever Clocks Screensaver (CLEVERCLOCKS), iTunes Podcasts (ITPC), My Channels (MYCHANNELS)