Hey, Willy! Great to see it's never to late to join the "dark side" !!
Actually, I am very schooled on doing very manual, basic FS9 methods in FSX. So, yes, I do use the fancy AI Planner thing BUT good ol' Lee Swordy's TTools (god bless him) does also work in FSX! Using it right now decorating the Solomon Islands with some WWII flightplans. Download it into FSX. Each I launch it I get an error message (you will get used to this porting in FS9 planes - 80% of my 1000+ planes in FSX are portovers btw) but just click ok and up it comes and away you go. Happy flight planning.
expat