This patch improves stability, adds visual effects and optimization to STALKER Complete 2009 1.4.3. Patch 1.4.3.2 is cumulative and includes patch 1.4.3.1, so no need to install both.
AtmosFear Blowout Expansion is an add-on to AtmosFear mod that replaces vanilla blowout sequence. However it can be installed as a standalone mod without installing AtmosFear main