Hi allI am thinking of doing a clean install before installing sp2.Do i uninstall all my add ons,active sky-photographic scenery,etcthere are dozens of them,before uninstalling fsx,or uninstall fsxwith everything intactMy thanks for your help and advice Don

Don,a clean install is the safest way, but first, i would try to simply install SP2 over an existing FSXSP1+add-ons.You only have to save your terrain.cfg and overwrite the SP2 terrain.cfg with it. And delete your FSX.cfg and let FSXSP2 build a new one.If you encounter problems (except the known issues with FS9 models), then i would do a clean install by uninstalling and cleaning everything and then reinstalling everything.