Just purchased a 436, loaded the Sentinel on my Computer. I'm old school and this scanner is Like WOW!! it's Daunting. I managed to somehow get it scanning my area. But Not sure how I did it in sentinel. I wish there was a manual of some type which would take you STEP by STEP Explaining from START to FINIISH how to program it. I feel so overwhelmed. I want to learn, but am having a hard time understanding the newer logic to programming it. I know it can be done, others have learned. Is there such a thing out there? Thanks!!