I noticed that FAIB airplanes have repaints optimized for FSX in .dds format, so there might be a performance improvement. I've cut back on AI use since I have quite a bit of add-on scenery that has slowed my system down over the years and I mainly use PMDG products. I have plans to do a clean install, but when I look at all the pakacges I have accumulated over the years, I just have to wonder how long it would take me to reinstall them all over again