Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
I do not understand
Two installation files are available
SSW-FIAT-G91-FSX.1.1.0.exe 210.21MB
SSW-keyless-installer-unified-FSX-v1.0.0.exe 1.31MB
If you also have the P3DV4 version, you will have four files in total. Two aircraft installers, and two keyless installers. Above, kdl said he used "SSW-keyless-installer-unified-v1.0.2.exe" and it did not work. If he has installed the FSX version of the aircraft, then that keyless installer file would not work. He needs to use the one you mention "SSW-keyless-installer-unified-FSX-v1.0.0.exe"
The file "SSW-keyless-installer-unified-v1.0.2.exe" is for the P3DV4 version of the aircraft.

I downloaded the FSX version and had problems with registering (like described above). Then I got a message from Simmarket of this no key version for FSX. I downloaded it. After installing first the main airplane and after that no key update I started flying the airplane. Everything was black! inside the VC as well as outside the airplane. I looked the folders of the plane. There ware no textures at all? I have FSX Gold edition i.e. complete package. I don't have Tackpack.
I wonder what is PBR-model...
You need the FSX livery pack here: http://94.177.167.28/public/simskunkworks/wp/index.php/how-to-get-our-models-liveries/