Yes, with the changes SP2 incorporates you all need to be careful of editing the FSX.cfg file. Many of the tweaks used in the past, like what happend with SP1, are no longer helping the sim and in many respects cause problems. The only tweaks that should be looked at are ones that are designed for dual/quad core, the light scale for the airports, the tweak which removes the sims ability to preload the default flight and only if the system is very slow, perhaps work with the added autogen lines, but otherwise Aces did a bang-up job of getting FSX to run without having to tweak the config as of SP2
And yes, a clean install getting rid of the old install and allowing FSX to update as Aces intended with SP2/Accell is the best way to go.
Install RTM, fire up the sim and let it complete the install and boot the default flight.
Close the sim
If you have the Deluxe version and want the SDK installed, install it off the DVD now
reboot the computer
Install Acceleration which will install SP1 and SP2 automatically. Boot the sim and allow it to complete the install and boot the default flight.
Close the sim
If you want the Acceleration SDK install it from the disk
Reboot the computer
Make sure you have the latest DirectX installed http://www.microsoft.com/downloads/deta ... laylang=en
and make sure you have the C++ library update installed http://www.microsoft.com/downloads/deta ... laylang=en (many add-ons install this update now automatically. I belive Acceleraton does too)
Start the sim, set up the sliders/checkboxes as you had them. Close the sim
Install your addons one at a time, reboot in between and make sure you have the updates for them. UT requires special Acceleration updated depending on which version you have. You will find a link to it in the payware forum I posted.
UT also has an issues with the terrain config for ocean and lake waves. It requires manually editing it. If you need that process I will send it when I get time.
DO NOT MIGRATE the FSX.cfg file you have. Use it to copy/paste edits but do not overwrite the new file.
The best tweaks are now all in Windows setup and the correct use of O&O Defrag
here is a list of the ONLY areas one may wish to work with
[Display]
TEXTURE_BANDWIDTH_MULT=70 <----- I would be cautious with this after SP2. Try 50 to 90
keep in mind FSX is not FS9. Although the max Texture Bandwidth Multiplier can go to 400 like FS9, to do so is suicide in FSX. I would say most should be somewhere around 40-90 MAX
UPPER_FRAMERATE_LIMIT=0 <----- You will probably have to frame limit at 24, I don't beccuase my system is very fast and unlimited is much smoother. Try both.
WideViewAspect=True (FALSE if you do not have a wide screen monitor)
RUNWAY_LIGHTS_SURFACE_SCALAR=1.2