Generally, I don't like the Abacus products, except FSDS of course.
For example their premium collection is very expensive for the low details and many missing characteristics.
If have tried some of its demos. I also have Fighter Pilot (in CD-version), the f-16 and f-18 are good, the F-15 is still ok, the tomcat is horribly like another plane! The cockpit is not a tomcat cockpit!!! They just placed the gauges where they thought it's most ergonomic to place em! And the Cockpit has a HUD like a Gripen!!! They should know that the Tomcat's HUD is built into the front window!!!
But, however, I don't know about the other products...
My tipp: Install it to an empty folder, then copy&paste to your flightsim directory. This helped me often with bad installers and silly products.
i dont use abacus because i really wont buy from them with all the bad reviews, but as for you, if you want to fly stuff like f-16s go get falcon 4.0, its the most realistic thing out there when modded, just make sure to get the original falcon 4.0, not allied force if you want to use mods.
only payware i have gotten so far was the old fs scenery enhancer for fs 02, that was decent, now im looking at a bunch of payware for fsx, primarily global 08, fex, fgx, and a track ir