FS9.cfg , Display entries, search for explanation from ...

Hello, I run FS9 on a P4 2.4, 1 giga Ram, GF4 TI4600 with 2 monitors linked.I did observe that I had 4 display entries in my FS9.cfg (I think 2 per monitor) , here they are : "(DISPLAY.Device.NVIDIA Drivers on Win2K/XP.0)-> Brakets replaced by ()Mode=1600x1200x32RenderToTexture=0AntiAlias=1PanelAsTexture=0TriLinear=1TextureAGP=0 and(DISPLAY.Device.NVIDIA Drivers on Win2K/XP.1)Mode=1152x864x32PanelAsTexture=0TriLinear=1TextureAGP=0 and(DISPLAY.Device.NVIDIA GeForce4 Ti 4600.0)Mode=1600x1200x32RenderToTexture=0TriLinear=1(DISPLAY.Device.NVIDIA GeForce4 Ti 4600.1)Mode=1152x864x32"Yesterday I did install the new Starstorm Nvidia 52.16x driver version on my GF4 vid card and now I have 2 MORE entries in the FS9.cfg file !!here they are : "(DISPLAY.Device.NVIDIA GeForce4 Ti 4600 (StarStorm 52.16x).1)Mode=1152x864x32(DISPLAY.Device.NVIDIA GeForce4 Ti 4600 (StarStorm 52.16x).0)Mode=1600x1200x32TriLinear=1"My questions : why 3 X 2 entries? What is the purpose ?Are some entries duplicates? Do I need to delete some?Why is some entries do I find some options : mode=, Trilinear=, rendertotexture= , and NOT in some others ? Do I need to add these options in all the entries?Any recommendation?Thanks in advance