I read somewhere that FSX, Whne FIRST installed reads the computers memory and loads this data, along with graphics card, CPU etc.......I recently installed 1 GB of Ram and I get slow downs or freezes periodically when using FSX (flying UA Super 80), (this is why I added memory. ) My question is...Do I need to Re-install FSX to read the Larger MEmory???? thanx Dan(Not the best Computer:Windows Vista 323 GB Memory