This tutorial is provided AS IS, with no implied warranty. You assume full responsibility, neither myself or Intel are responsible for any damages to your PC, map files, assets, etc.
So you have an older Phenom or whatever AMD CPU (or even an older Intel CPU (u wot Pentium 4 m8?) and you don't have SSE 4.1, well read on.
For AMD users from my research only Bulldozer+ CPUs support, Intel CPUs all the way back to Penryn should support it from 2008.
If you're unsure check in CPU-Z if it supports 4.1.
To start download this from Intel:
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Make sure to grab the win version, other is Linux I believe. And get something like 7zip to extract it.
1. Extract the files to BO3ROOT\bin (where the exe's are for Radiant, Launcher, etc.).
2. Right click on "sde.exe" and send to Desktop to create a shortcut there.
3. Right Click on it and open its Properties and enter this to run the Launcher under it:
4. Now you can run it (might take a minute to load Launcher) and select your map to compile lights/link. DO NOT run APE/Radiant under this, they are very glitchy which is why I recommend doing it under Launcher, once you do that, you should have Lighting in Radiant. And again this can take a while, especially linking.
Some screenshots for pr00f: (more once it compiles incoming)