If you need to bring in space empty fuel tanks (To be filled or to be used like structure) here is this simple mod:
The only mod in those parts is just the fuel amount, the rest is strick stocks.
If you need to build a fuel space station to be refuelled by kethane without build a monster lifter, you will need that simple mod.
Maybe you need that just for have a stable struct lifting just the net weight of a tank.
Installing addons in KSP is as simple as moving files into their appropriate folders. This guide explains which folders hold each type of addon, and how to locate them. Keep in mind that Addon packages may contain any combination of addon types. These instructions are meant only as a generic guide.
The first step to installing an addon is to locate the KSP folder in your computer. This is where KSP keeps all of its files, including your game saves and screenshots. The KSP folder is located where you unzipped it when you first downloaded the game.
The KSP Folder contains the following subfolders:
NOTE: On OSX, the KSP_Data folder does not exist. (Its equivalent lives inside the App package)
Parts are all contained inside KSP/Parts. Each part has its own subfolder in the Parts folder:
To install new parts, extract the part folders from the downloaded package into the KSP/Parts folder.
Craft files are saved ships created in the game. These files can be placed in a few different folders:
In KSP/Ships, you will find separate subfolders for the different construction facilities in the game. The VAB folder, for instance, holds craft files that are editable on the Vehicle Assembly Building in game, and launched from a Launch Pad. Similarly, the SPH folder holds craft files that are editable in the Spaceplane Hangar Facility, and launched from the Runway.
Craft files placed in a subfolder of KSP/Ships will be available to all saved games. Ships placed here are considered to be "Stock",. They won´t be overwritten directly if edited, and cannot be deleted from inside the game.
It is also possible to make craft files available to only one saved game:
Each game started creates its own folder in KSP/Saves. Each save has its own Ships folder, which is organized in the same way as the common Ships folder above. Craft files placed in one of the subfolders are only visible when playing the corresponding game, and can be overwritten and deleted. Ships created while playing the corresponding game are also saved in these folders.
The KSP/Saves folder contains the training and scenarios subfolders. SFS files in the training subfolder are listed in the Training section of the Main Menu in the game, and files in the scenarios subfolder are visible in the Scenarios section of the menu.
To install scenarios and training missions, extract the SFS files from the downloaded package into the appropriate subfolder.
The KSP/Plugins folder holds the DLL files for plugin-powered addons. These plugins extend the funcionality of the game, adding new part types, or new missions.
To install a plugin, extract the DLL files from the downloaded package into the KSP/Plugins folder.
Some addons add new internal spaces and objects. Those are installed in the KSP/Internals folder.
Props are objects that can be added into internal spaces, like cockpit gauges or cabin decorations. Each internal prop has its own folder in KSP/Internals/Props:
Spaces are the internal models that are associated with parts. Each internal space has its own folder in KSP/Internals/Spaces:
To install internal props and spaces, extract the folders from the downloaded package into the appropriate subfolder.