[Suicide Junkie]

The combat pack goes into se4\pictures\combat
The planets pack goes into se4\pictures\planets
The component pack goes into se4\pictures\components

...and so on...

You don't need to put a copy of the image packs into the mod folders, since they are designed to be fully backwards compatible with stock.
Especially since the whole thing is 50+ megs installed, more than one copy would be expensive.