by Gregorio » Sat Dec 01, 2012 7:07 am
As far as I know, Acceleration is a buffed version of SP2, which should also include changes for SP1. So no additional downloads would be necessary after installing Acceleration. Even Simviation says that it "is now hosting the FSX Service Packs 1 and 2 for those who do not have FSX Acceleration". As I saw in another place, unless you want only SP2 but none of the features of Acceleration, than install the former. Otherwise, Acceleration should be all you need. I personally did the same thing, bought FSX Golden Edition and installed Acceleration, and haven't had any problems with any addons that require either service packs. Hope it helps!