Installation guide:
1. Go to your Crysis game folder -> Electronic Arts -> Crytek -> Crysis -> Game.
2. Copy the downloaded object file into the current game folder (Game).
3. Start Sanbox 2 Editor.
4. Go to the Database Editor and use the Prefab Library submenue to open the erikm_buildings.xml.
5. Now you can use the Prefabs under the Prefab menue.
6. If you publish your level, be sure to extract all parts of the prefab, or make a mod which includes the pak file.

das ist zb die anleitung für des was ganz oben steht. bei allen anderen steht das auch