Additional missions, new airplanes.See: http://www.fsinsider.com/product/features/...celeration.aspx

Simple fact is that the devolopers cannot afford to develop planes for all the versions of fsx the cost would kill them. SP2 is here for good so we will simply have to sort out the issues and live with them if we want new planes. Mind you except for a few texture problems i do noe have any issues.

that page doesnt do complete justice to Acceleration IMHO, it contains all of new aircraft: 3 ( F/A-18, EH-101, racer modified P-51 )new missions: 37 of themnew sceneries:5 ( Edwards, Mt St Helens, LongLeat, Templehof, Istanbul )new core sim functionality in 3 areas: carrier ops simulation( working catapults and launch bar, working arrestor cables and tailhooks, working meatball ), multi-engine helo simulation, engine sim support for racing ( ADI, engine failures, supercharger )plus multiplayer racing and SP2

OK. So the pecise and unambiguous answer to Scotts query "acceleration" and "sp2" sdks are not the same, and there is capability in acceleration sdk not present in sp2 sdk, is, or should be, "No, both of the SDKs are identical".Rod.

Of course the SDKs are different because Acceleration has "for pay" functionality that is not contained in SP2.The SP2 contained in Acceleration is the same as the SP2 stand-alone. So the SP2 SDK can be used to generate content that will work in both SP2 and Acceleration.If a developer wants to leverage new functionality contained in Acceleration and make Acceleration a pre-requisite for their add-on they can use the Acceleration specific functionality in the Acceleration SDK.Is that clear?

Crystal.Rod.

>Is that clear?Knowing what you meant, yes it is clear.OTOH, as a developer I can build an aircraft with Acceleration specific features using only the SP2 SDK, although it will only run properly for users who own Acceleration. ;)

>Is the DA Cheyenne for FSX actually out?Yes and requires SP2... And works brilliantly.Chris Porter:-outtaPerthWestern Australia