Quote: "is it possible to load multiple textures through the FPE file?"
Nope. If you use multiple textures, apply them in your modelling program and export them with the DIrectx file. In the .fpe file, leave the "textured = " blank. Keep in mind, though, that normal maps and specular maps will be ignored. I don't know why this is.
Quote: "Another question i have is if there is a list of all the commands which can be added and set in the FPE.
"
I think I saw one somewhere, but I'm not sure! If I did, I wish I had saved it, sorry!
Desktop: i7 4770@3.4Ghz (passmark 9809), 12GB RAM, Win 10/64, GeForce GTX 1080 (passmark 12006), 1TB SSD, 1TB HDD; Laptop: i7 4800MQ@2.7Ghz, 16GB RAM, Win 10/64, GeForce GTX870M , 1TB SSD.