Make Sure You Un-Zip This Mod Before Installing So It Will Work.
===Basic Install===
Copy The Space Parts 0.24.2.559 Into You GameData Directroy. It Should Look Like This:
KerbalSpaceProgram/GameData/Space Parts 0.25.0.642
===Optionals===
If You Want To Add In The Optionals Copy Them So Your Directory Looks Like This:
KerbalSpaceProgram/GameData/Space Parts 0.25.0.642 Optionals
Thank You For Using This Mod.
===Previous Versions===
Step 1. Un-Install The Previous Version.
Step 2. Install The Current Version.