1 - In the Crj 700, some cargo doors are on the left side. Can GSX put cargo belt on the left side ? If not when will it be possible ?
This has been discussed several times on the forum, GSX doesn't support loading cargo from the left side. Might appear in a future update, but it's not supported right now.
2 - Today I was fliing with an airplane that had 3 cargo doors, is it possible to add a third cargo door to GSX ?
Same as above, but I don't believe we'll add a 3rd cargo door in the normal version. This might change it we'll release an expansion package based on GSX, covering real world cargo operations, which is something we are considering.
3 - In the 747 F there is a cargo door in the nose of the aircraft, is it possible to add a cargo lift there ?
See my above reply. Nose cargo doors will be added in a cargo-dedicated product, but not in the GSX base program.
4 - When I fly to LPPT( my hometown airport) the pushback is done by those by trucks and not with the small ones (see video for refference ). Can we choose the type of pushback trucks ?
As explained on the manual, the truck type is selected depending on the airplane weight.
They use something like this (http://farm5.staticflickr.com/4141/4746237371_0f2e7f5aec_z.jpg)
We have that type in GSX, and it's configured to appear when the airplane max_gross_weight from the aircraft.cfg is more than 170000 lbs. AND the parking radius is larger than 18 meters.
5 - Is there an option for deicing ?
This has also been discussed many times on the forum: they are surely planned for a future upgrade of the base program (meaning: a free update), but will come after we'll add the two missing editors: the graphical Airplane configuration editor, and the Marshaller/Docking system editor.
PS: Is it possible for a certain airline for example TAP, with all TAP airplanes the cargo boxes will say TAP Portugal and with their logo. For Iberia the same, Iberia airplane cargo boxes will say Iberia and will have their logo. ?
We need to add a TAP repaint to the vehicles set. That can be done fairly quickly so, expect it to see it soon.