QualityWings, the developers of the BAe146 and Boeing 757 and of the forthcoming  Ultimate 787 Collection, announced that they are currently in the final stages of testing of the last service pack for the Ultimate 757. A complete list of fixes is not available yet but it was already stated that FSX sound cones issues for the engines will be addressed and also that the installer will allow for installation into the Prepar3D versions 1 and 2. Yet due to some incompatibilities with P3D, QW don’t fully endorse this last service pack as P3D compatible. The final full installer will however allow those with a license for the Ultimate 757 Collection to install the product in FS9. FSX and also in Prepar3D versions 1 and 2.