I just bought this and am a bit confused. I suspect I'm making it more complicated than it is. What I want do is record the images as I travel down the lake and review them at home on my PC. The unit came with 6.46 if that applies. What do I have to do to make sure the recording is occurring and what downloads do I need to see it all on my PC? I have an 8GB card installed. Thanks in advance. I'm really looking forward to using this, this season.