Some questions...

Hello, I've some questions about Fligthgear 0.9.10, using Windows Xp:1) Where can I download many new aircraft? I have already downloaded models from notest sites.I'm interested in civil and general aviation aircraft.2) I downloaded FlightPlan and I think it's a great instrument; there is also the option "export plan". Can I import plans in flightgear? If it's possible, how can I do?3) AI traffic: _I tried to compile my own fgtraffic file and some airtraffic files following the pdf istructions, but nothing appended in the simulation. I definited the aircraft, the flight(the departure port(LIME - Bergamo Orio al Serio) and the arrive one (LIMC - Milano Linate), and time)...So I modified the fgtraffic file but nothing..._when I define a flight (for example from LIME to LIMC) the aircraf follow the shorter route betwen the ports? For a realistic fly, I have to impost a flightplan? With a flighplan, can I decide even the departure and arrive runway?_I'd like the aricraft makes even the taxi run from terminal to departure runway and from arrive runway to terminal.How can I do?_when an AIaircraft ends his own flight, does it remain in the scenery or it is deleted?_is there sone place where download Ai flights or someone who share his files?4) when I begin a flight I'm allready on the runway, how can I begin from airport terminal or tower? I'd like to to the taxi run...5) when I begin a flight I tune my com1 on ATIS; after the ATIS message, I think I have to comunicate with tower to be allowed to taxi and take off.Is it possible? I want to be part of airport traffic not only in the landing!6) Is there any way to make land support traffic (bus,trucks,etc..) or will be implemented in the future?7) navigation: _I read and understood flighsim navigation site;_I make a flightplan with flighplan software and I stamp it;there are written the VOR or NBD frequencies of the NavAid, distances and time to flight(function of speed of the aircraft, imposted in the preference)and someother things.I use as software database for airport and airnav the flightgear database.Where I flight I follow the route just becouse I impost the right degrees value on OBS but I have to calculate where change route in function of time to flight(distance/speed).It's not precise but instrumets seems not to work.In other words:I dont't know where I am!I don't know the distance from the NavAid(NDE don't work), and all the other information instrument should tell me...It's like frequencies are wrong but I dont' understand why, if the database it's the same!_I wonder if in the reality I should be contacted by someone who tell me I have to change route...some years ago,whit "propilot",radio comunication informed me when and where I had to turn...and in flighgear?8) ATLAS: how can I get europe and other world maps? With the software there are only 2 USA maps...9) weather: _I don't understand how METAR option works;_do rain can be visualized only whit thunderstorm option? It should be good if it could rain even with forecast..._is there a better rain visualization?_3d(volumetric) clouds are only colums?I don't visualize the other kind of cloud in 3d way.It's a problem of mine or it's because this function isn't implemented yet?_is there snow?10) where can I download better scenery texture?11) how many ship models there are?12) I can't see the vapor trail of my aircraft(as show in one of the official site picture):is it because I fly to low(never over 20.000 ft) or do I gave to activate them?13) I can see the ships or seaplanes wakes...what do I have to do?I'm not good in programming or modify hardly xlm or other files,so I thankfull if you can explain me the easiest than possible.Sorry for my bad english and thank you or all the answers!Have a nice day, Gibi.