charliearon

Try turning off "Aircraft casts ground shadow" in your settings. This was suggested for some FS9
 
models being used in FSX, but it's worth a quick try.

For a short flight, let's say 500 miles or less I start with no more than 50% in each tank.  Cruise altitude of at least FLT340, MACH speed set at cruise
 
of about .72.  I create IFR flight plans and let ATC run me ragged with all of the altitude and heading changes.  If you haven't tried an ILS approach
 
yet, it may be a good time to learn this proceedure.

After attempting the lessons a few times and having Rod become annoyed with me in short order, 
 
I've never finished a lesson.  Is there suppose to be a "Lesson Successful" Banner or something
 
that pops up at the end?  I did accomplish the "Solo Flight" and "PPL" a while back  and remember
 
the "Sweetie" in charge never happened to mention "Land the plane, fool" at the end of the
 
flight.  I finally figured that out on my own.
 
If you  accomplished the requirements of that lesson, then I would push onward.

Look in FSX/Scenery/World/Scenery for trafficAircraft.bgl.   This is where the default traffic comes
 
from.  The other program may have changed the extension to something else.

Go to the Library and download and run this program to fix your effects that got corrupted.
 
gauges_recovery_fsx.zip

I was just playing around in my Iris T-6.  I assume you are describing head movement in
 
the cockpit using the spacebar+mouse and not something like TrackIR.  Mine seemed
 
very smooth considering I have a 2 GZ. processor and had a download going at the
 
same time.

If you are not getting past the "Splash Screen" there may be a problem with your
 
logbook. (It happens)!  Go to My Documents/Flight Simulator X Folder,
 
open it and find the logbook.bin file.  Re-name it so it's saved and then
 
start your Sim to see if it works.  You can always download a logbook
 
repair program to fix the original logbook.bin file.

Look for gauges_recovery_fsx.zip  here in the AVSIM library or at Flightsim.com
 
Run the downloaded program to fix effects file that have been corrupted.

Light blue opening screen as in "Splash Screen"?  During your install did you start FSX and initiate a flight before moving on to the Acceleration install?
 
Try going to My Documents/Flight SimulatorX Files and rename your Logbook.bin file.  Start FSX and see if it will go past the Splash Screen.

Check your sound settings in Control Panel to see if it's being directed towards earphones.