• Change the “Device” section that it looks like this:

  Section "Device"
      Identifier              "Videocard0"
      Driver                  "nvidia"
      # optional (find out with "$ Xorg -scanpci")
      BusID                  "[Your BusID, e.g.: PCI:2:0:0]"
      Screen                0
  EndSection
  

• Add a new “Device” section for the TV, just like the one before, but change “Screen 0″ to “Screen 1″ and “Videocard0″ to “Videocard1″
• Change the “Monitor” section as follows:

  Section "Monitor"
     Identifier        "Monitor0"
     HorizSync      30.0 - 100.0       #adjust to your monitor
     VertRefresh   50.0 - 94.0         #adjust to your monitor
     Option            "DPMS"
  EndSection
  

• Add a new “Monitor” section for the TV, just like the one before, but change “Monitor0″ to “Monitor1″
• Now we configure the possible resolutions for CRT and TV

  You will have to adjust them to your liking. “Screen0″ deals with the CRT, “Screen1″ with the TV.

  Section "Screen"
      Identifier     "Screen0"
      Device         "Videocard0"
      Monitor        "Monitor0"
      DefaultDepth    24
      Option         "metamodes" "CRT: 1600x1200 +0+0; CRT: 1400x1050 +0+0;
      CRT: 1280x1024 +0+0; CRT: 1024x768 +0+0; CRT: 800x600 +0+0;
      CRT: 640x480 +0+0"
      SubSection     "Display"
          Depth       24
          Modes      "1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
      EndSubSection
  EndSection
  Section "Screen"
      Identifier     "Screen1"
      Device         "Videocard1"
      Monitor        "Monitor1"
      DefaultDepth    24
      Option         "metamodes" "TV: 1024x768 +0+0"
      SubSection     "Display"
          Depth       24
          Modes      "1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
      EndSubSection
  EndSection
  

• Now you we are physically set up and can define a Serverlayout which defines how the monitors do correspond to each other.
  In this example the CRT will be the primary monitor whereas the TV can be reached by dragging the mouse cursor out the left side of your monitor.

  Section "ServerLayout"
      Identifier     "Layout0"
      Screen      0  "Screen0" 1024 0
      Screen      1  "Screen1" LeftOf "Screen0"
      InputDevice    "Keyboard0" "CoreKeyboard"
      InputDevice    "Mouse0" "CorePointer"
  EndSection
  

Now we are all done. Save xorg.conf and restart your Xserver(in Solaris logging out and in again will do the job).
A working copy of my file as an example can be downloaded here.