Out of my head its hard since I'm not a programmer guy, right?
There should be a new controler in the dat, called "Unified Render Controler", with the following properties (I'll also paste the comments I can see in my tools):
Medium Lod Distance - Enable bump map and caustics if distance less than this value (SH metrics 1 = 10 meters)
LowLod distance - If distance greater than this value, only the sun is considered (SH metrics 1 = 10 meters)
Bumpenable YES/NO
SpecularMaskEnable YES/NO
SelfOccEnable YES/NO - enable the self occlusion map - specified normally in the roster file
UseSpecularFromDiffuse YES/NO (from the diffuse texture they mean)
Caustics- this being the old controler from SH3, moved here under URC.
I'll try to get more details tomorrow

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