Must be Spring fever!? For me it's a complete reinstall of FSX, sheesh.
O, but I now have a new, slimmed down version running smooth at 30 FPS in FTX PFJ, NRM and next is PNW. I have no fsx.cfg tweaks at all! After PNW I'll tackle all the RTMM files. Luckily, I've save my old Addon Scenery folder so I only have to download some sound/traffic files and activate them all. Should be able to explore MM by tomorrow.