We currently offer a massive range of downloads for FSX, as well as older flight simulator add-ons for the ever-popular FS2004, FS2002, CFS3 and now becoming ever popular with dediced virtual aviators is Laminar Research's X-Plane series.
After testing we found out that r0;Rwy12 Object Placerr1; works fine with FS-X. This was actually expected because Rwy12 is based on the relatively new XML format and all objects in the 40 contributed libraries are made with Gmax. Luckily, it also turned out that Microsoft did not change the GUID numbers of the default objects.
Latest news, "Ebenezer" found out that you can update a Rwy12 scenery (in FS-X) without the need to exit and reload the sim. Please see here;