This is a setting hack that can be enabled on the "Settings" page of the Mods List.
This hack allows you to sprint while inside an interior.
Completely rewrote this hack to fix an issue where if you started a mission with an animated camera at the start, cancelled it and then used mission select to go to a mission that starts in an interior, it would play the previous mission's start camera.
Moved this hack to the new "Settings" page.
Added this hack.