Refreshing a video game installer

greetings, I am interested in refreshing the installer for the video game star citizen, and bringing it to relative parity with our lutris install where its possible.
Unfortunately the game’s launcher appears to hang on an installer dotnetfx45_full_setup.exe and never complete, slowing my testing. The install process doesn’t seem to recover after killing it. Upon reopening bottles the game’s launcher is revealed to be successfully installed and runs though.

is it possible to set environment variables for the game or bottle in a place that the user can modify them after install?
is it possible to set DLL overrides for the game or bottle in a place that the user can modify them after install?