All settings are completely customizable in the lua script.
For a full list of customizable settings check the doc tab.

Storage Module Reward Changes :
Mission Board Low:
Multitool Module:
Percentage Chance: 1 -> 5
Ship Module:
Percentage Chance: 1 -> 5

Mission Board Med:
Multitool Module:
Minimum: 1 -> 2
Maximum: 1 -> 2
Percentage Chance: 6 -> 6
Ship Module:
Minimum: 1 -> 2
Maximum: 1 -> 2
Percentage Chance: 6 -> 6

Mission Board High:
Multitool Module:
Minimum: 1 -> 3
Maximum: 1 -> 3
Percentage Chance: 6 -> 6
Ship Module:
Minimum: 1 -> 3
Maximum: 1 -> 3
Percentage Chance: 6 -> 6

Mission Board Mega:
Multitool Module:
Minimum: 1 -> 4
Maximum: 1 -> 4
Percentage Chance: 7 -> 7
Ship Module:
Minimum: 1 -> 4
Maximum: 1 -> 4
Percentage Chance: 7 -> 7

Nexus Mission Mega:
Multitool Module:
Minimum: 1 -> 4
Maximum: 1 -> 4
Percentage Chance: 5 -> 10
Ship Module:
Minimum: 1 -> 4
Maximum: 1 -> 4
Percentage Chance: 5 -> 10

Outlaw Bounty Master:
Multitool Module:
Minimum: 1 -> 2
Maximum: 1 -> 2
Ship Module:
Minimum: 1 -> 2
Maximum: 1 -> 2
Freighter Module:
Minimum: 1 -> 2
Maximum: 1 -> 2

Crash Freighter Small:
Multitool Module:
Maximum: 1 -> 2
Percentage Chance: 8 -> 15
Freighter Module:
Minimum: 1
Maximum: 2
Percentage Chance: 15

Crash Freighter Medium:
Multitool Module:
Maximum: 1 -> 2
Percentage Chance: 8 -> 15
Freighter Module:
Minimum: 2
Maximum: 4
Percentage Chance: 15

Derelict Freighter Module End Terminal Option:
Freighter Module:
Maximum: 1 -> 3

Saved Freighter:
Freighter Module:
Maximum: 1 -> 2

Buried Cache Crates:
Multitool Module:
Maximum: 1 -> 2
Percentage Chance: 5 -> 10

Ship Scrap:
B Class:
Ship Module:
Maximum: 1 -> 2
A Class:
Ship Module:
Minimum: 1 -> 2
Maximum: 1 -> 3
S Class:
Ship Module:
Minimum: 1 -> 3
Maximum: 1 -> 4

Manual Installation :
Drag the PAK file into your MODS folder.
MODS folder should be located in No Man's Sky/GAMEDATA/PCBANKS/MODS

Mod Edits :
METADATA/REALITY/TABLES/REWARDTABLE.MBIN

For install and usage of AMUMSS to self update the mod or combine with other mods using the included Lua script please see AMUMSS How To

Other Mods : 
Reikokuu Mods