Please dont see this as being rude or disrespectful at all, i am saying this with the utmost respect!!
You purchased an extremely high fidelity aircraft with intriqiute (spelling ?) systems, i think you should explore the wonders that is the PMDG 777 and do the tuturial flights which came with the package, you will be totally amazed by it , and you dont need hours to setup and get to a runway to take off either, ok i must say i do have my flightplans loaded before hand, I usually fly in the changeover (taking over from previous crew), and for me i can within 10 minutes be ready to push back and hear those GE90 starting up, it all adds to the immense depth of this aircraft.
To spend approx $90 - 100 on a aircraft and just want to use it as a quickie then you could have used the stock standard 747/737 or Airbus that came with FSX, wouldnt have cost you anything.
Just take your time, the FMC isnt as daunting as it looks, most of it can be filled in with just a mere double click i.e. ZFW, CG etc...
You have this most amazing piece of art in your hands, learn to use it, you will not regret it for one day!
Happy flying, hope to hear you soon on VATSIM