I prefer to use the arrow keys for movement. Unfortunately the arrow keys are also used in the build mode and cannot be changed. So the player cannot move while in build mode when the arrow keys are also used for movement. We need some fix for this ( = option to change the keys in build mode) so players who perfer to use arrow keys for movement still will be able to move in build mode.

You will want this utility/mod then which compliments F4SE and allows almost total control of the key bindings (apart from separating grenade from melee)... http://www.nexusmods.com/fallout4/mods/10106/?