https://projectzomboid.com/blog/wp-content/uploads/2020/01/website-example-768x661.jpg doesn't exist.   

Itemized. 1)FishingLure Distributions.lua, Line 1001, under Outfit_Fisherman Should be either FishingTackle or FishingTackle2.   2)Golfball Distributions.lua, Line 1077, under Outfit_Golfer   Should be GolfBall. 3)Icepick Distributions.lua, Line 1126, under Outfit_Inmate Distributions.lua, Line 1139, under Outfit_InmateKhaki   Should be IcePick.   4)Radio.CDPlayer Distributions.lua, Line 1485, under Outfit_Student Distributions.lua, Line 1594, under Outfit_Varsity   Should be Radio.CDplayer.   5)Lightbulb ProceduralDistributions.lua, Line 15778, under RandomFiller   Should be LightBulb.   6)Mov_brokenglass Distributions.lua, Lines 59 to 62 ProceduralDistributions.lua, Lines 1408 to 1411 This is about "Mov_brokenglass_1_0", "Mov_brokenglass_1_1",  "Mov_brokenglass_1_2", "Mov_brokenglass_1_3". These 4 items do not exist. Dunno what should be in place. Perhaps something like Moveables.brokenglass_1_1?   EDIT: 7)Rubberband ProceduralDistributions.lua, Line 8270 Should be RubberBand.

That is the base multiplier. Start and peak multiplier will multiply on top of this initial multiplier. The formula for day one is ( Population Setting x Population Multiplier x Population Start Multiplier ) whereas the one for peak day is ( Population Setting x Population Multiplier x Population Peak Multiplier ).

Unless they added something new with 41.73, then I don't remember there being such an option. What the 'peak day' settings does is define how long (in days) it takes until the the day where the peak multiplier takes full effect.

Yes, if you are playing with very high zombie health scores, firearms are ineffective. Too inefficient.