Fallout 4
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Rabbit

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RabbitB

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About this mod

Allows you to directly launch F4SE from Steam, by replacing the default Fallout4Launcher executable.

Permissions and credits
The Fallout 4 launcher has an annoying issue, where it resets my mod load order whenever I accidentally launch it, which unfortunately is all too often, as it's what Steam launches if you hit Play. It would be so much nicer if hitting Play in Steam, would instead launch F4SE directly, so I went about and did just that.

This utility is very simple: it's a batch file that has been converted into an executable. All it does is replace the original launcher executable, and launches f4se_loader.exe, Fallout4.exe, or a custom executable, depending on launch conditions.

  1. If F4SE is found, then f4se_loader.exe is launched.
  2. If F4SE is not found, then the regular Fallout4.exe is launched.
  3. If you have a custom executable you'd like to launch, or would like to launch the original Fallout 4 Launcher from Steam, give the program the argument -launcher [custom executable name (including extension)]

Installation
  1. Rename your original Fallout4Launcher.exe; preferably to something you'll recognize, such as Fallout4Launcher_original.exe
  2. Copy the Fallout4Launcher.exe found in this mod, into your base Fallout 4 folder (where the original was located).
  3. Done. You can now launch Fallout 4 w/ F4SE directly from Steam.

Launch Custom Executable
If you have a custom program you'd like to launch (such as another utility), or even start the original Fallout 4 Launcher, you can do so by setting a launch argument.
  1. In Steam, right-click on the Fallout 4 icon and go to Properties.
  2. In Properties, click Set Launch Options.
  3. Type in -launcher [executable name]
The executable name needs to include the file extension; if the file cannot be found, the program will alert you. If you do not properly set the -launcher argument (misspell it or forget the leading '-'), then the argument will be ignored and the program will launch F4SE or Fallout as normal.

Source
I'm releasing this program as open-source, licensed under the MIT license. The original raw .bat file is included in the download, inside the Source folder.