I purchased a new Stealth III S540 video card...installed it....Unreal has been locking up during movie every time....downloaded new patches for both the game and video card....downloaded DirectX 7.0....currently have an AMD-K6...with 300 megahertz...Assus or Azzus SP397-V motherboard....currently running with 64MB of RAM....have 220MB hard-drive space left...have tried everyhing...PLEASE HELP...