Hi,
I just started playing Chaos Theory again on my new rig because I love it; the only problem was that I couldn't enable AA with SM3 to have best quality and HDR. So I searched a bit on a web and found how to do it (sorry, only for nVidia owners now):

1. Open regedit and search for HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\4D36E968-E325-11CE-BFC1-08002BE10318\0000

2. You should see a big list, find "_splintercell3.exe3D_32661390" here, double click and change the value to "c5 00 01 08"



3. Exit regedit and go to C:\ProgramData\NVIDIA, here is file called NvApps.xml, make a backup of it and then open the original file in editor

4. Search for chaos theory; under it there are few lines, search one with aa_behavior_flags and delete the whole line, then in line aa_feature_bits change "Value" and "Default" to 0x080100C5, so after that it should look like this:

<PROFILE Label="Splinter Cell: Chaos Theory">
<APPLICATION Label="splintercell3.exe"/>
<PROPERTY Label="multichip_rendering_mode" Value="0x0240400D" Default="0x0240400D" Itemtype="predefined"/>
<PROPERTY Label="aa_feature_bits" Value="0x080100C5" Default="0x080100C5" Itemtype="predefined"/>
<PROPERTY Label="hybrid_rendering_mode" Value="0x00000001" Default="0x00000001" Itemtype="predefined"/>
<PROPERTY Label="af_default" Value="0x00000010" Default="0x00000001"/>
<PROPERTY Label="gamma_correct_aa" Value="0x00020000" Default="0x00020000"/>
<PROPERTY Label="aa_default" Value="0x00000028" Default="0x00000000"/>
<PROPERTY Label="aa_selector" Value="0x20000000" Default="0x00000000"/>
<PROPERTY Label="aniso_selector" Value="0x10000000" Default="0x00000000"/>
<PROPERTY Label="aniso_sample_optimization" Value="0x00000000" Default="0x00000000"/>
<PROPERTY Label="d3d_negative_lod_bias_status" Value="0x00000001" Default="0x00000000"/>
<PROPERTY Label="ws_aa_fs_gamma" Value="0x00000002" Default="0x00000000"/>
</PROFILE>

5. Save the edited file, go to your nVidia Control Panel, Select "Manage Settings", choose "Program Settings" tab, find Splinter Cell Chaos Theory here (or add it if you don't have it in list), change "Antialising-mode" to "Enhance the Application Settings" and "Antialising-Settings" to 4x (or higher values, depends on thepreformance of your Video Card), click Apply and try to run Splinter Cell, AA should work now...



So, that's all, enjoy Chaos Theory with HDR and AA!