I installed Solaris in Fusion and the Solaris tools created a file that was so complete I copied it over to my Parallels installation of Solaris. You might want to try that.
Edit: or try this. It's that file without the comments. Take care with any lines that wrap:
Section "ServerLayout"
        Identifier     "Simple Layout"
        Screen         "Screen 1" 0 0
        InputDevice    "Mouse1" "CorePointer"
        InputDevice    "Keyboard1" "CoreKeyboard"
EndSection
Section "Files"
        RgbPath      "/usr/X11/lib/X11/rgb"
        FontPath     "/usr/X11/lib/X11/fonts/TrueType/"
        FontPath     "/usr/X11/lib/X11/fonts/Type1/"
        FontPath     "/usr/X11/lib/X11/fonts/Type1/sun/"
        FontPath     "/usr/X11/lib/X11/fonts/F3bitmaps/"
        FontPath     "/usr/X11/lib/X11/fonts/misc/"
        FontPath     "/usr/X11/lib/X11/fonts/100dpi/"
        FontPath     "/usr/X11/lib/X11/fonts/75dpi/"
EndSection
Section "Module"
        SubSection "extmod"
        EndSubSection
        Load  "bitstream"
        Load  "type1"
        Load  "IA"
        Load  "glx"
EndSection
Section "InputDevice"
        Identifier  "Keyboard1"
        Driver      "Keyboard"
        Option      "AutoRepeat" "500 30"
        Option      "XkbRules" "xorg"
        Option      "XkbModel" "pc104"
        Option      "XkbLayout" "us"
EndSection
Section "InputDevice"
        Identifier  "Mouse1"
        Driver      "mouse"
        Option      "Device" "/dev/kdmouse"
        Option      "ZAxisMapping" "4 5 6 7"
        Option      "Emulate3Buttons"
EndSection
Section "Monitor"
        Identifier   "apple"
        HorizSync    31.5 - 79.0
        VertRefresh  50.0 - 100.0
  Modeline "1440x800_60.00"  93.80  1440 1512 1664 1888  800 801 804 828  -HSync +Vsync
EndSection
Section "Device"
        Identifier  "Standard VGA"
        Driver      "vga"
        VendorName  "Unknown"
        BoardName   "Unknown"
        Option      "DPMS"
EndSection
Section "Device"
        Identifier  "* Generic VESA compatible"
        Driver      "vesa"
EndSection
Section "Screen"
        Identifier "Screen 1"
        Device     "* Generic VESA compatible"
        Monitor    "apple"
        DefaultDepth     16
        SubSection "Display"
                Viewport   0 0
                Depth     8
                Modes    "1440x800" "1024x768" "800x600" "640x480"
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     16
                Modes    "1440x800" "1024x768" "800x600" "640x480"
        EndSubSection
        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes    "1440x800" "1024x768" "800x600" "640x480"
        EndSubSection
EndSection
Section "DRI"
        Group        0
EndSection
					 
				
			
			
			
		 
		
		
		
			
			
				Last edited: Jun 14, 2007