Maddog 2006 Questions - User Help

Hi! I have recently purchased the Maddog 2006 http://www.flythemaddog.com and have a few questions. It seems the users aren't following the message boards and the team is busy with SP1.Wx radar - I'm not sure I'm using this simple device correctly. Does the tilt give ground returns in green or is that clouds rendered? Also, when using the Gain dial it displays yellow and says Wx VAR. Then the ND fills with green. How can I tell if I'm using the right adjustment for normal return? It seems when it's green is when it's normal. I own the RXP Wx Radar and feel kinda dumb using the MD one for some reason.Gauge sounds. Has anyone figured out what some of the sounds in the control panel are for? vol_cfg? vol_ls? vol_airco? A few of the sounds aren't named in a way for me to completely understand. I managed to lower a bunch so only the warnings are loud, but I'd like to know what a few of them actually do.What is /N or /A in the fuel entry page for?Thanks