I have sought long and hard to find an answer to my gaming dilemma. I want to be able to use MS Flight Sim X (FSX) on my Vista based computer but no matter what I do I get crash to desktop when using FSX. Caused by an out of memory error I am told. When I fly using FS9 (2004) this doesnt happen. What I am looking to do is to fly to my hearts content the sim aircraft from PMDG and other advanced sim aircraft using FSX Some have told me its because Vista improperly uses RAM when more than 2gigs are present (my system has 4gigs) Can someone help me to find a solution to this problem please? I have also purchased a copy (legal) of MS XP Pro as the last resort... I hate to go back and reinstall all of my sim stuff - its huge and will take way too long!