How to implement an alternate Title Screen background layout (Sonic 1 Github AS/ASM68K)

Hello, this is my first tutorial, and i hope this one will be helpful to anyone. Are you just tired because you want to edit the title screen's background layout but you can't due to GHZ using the same layout? This is the tutorial for you. First of all, before we go straight up to the code, go to levels folder, make a copy of ghz1 and ghzbg and rename them to ts1 & tsbg. After that, open sonic.asm and search for LevelLayoutLoad. Next, below ; End of function LevelLayoutLoad2, paste this:

TitleScreen_LayoutLoad:
lea (v_lvllayout).w,a3
move.w #$1FF,d1
moveq #0,d0

TitleScreen_ClrRam:
move.l d0,(a3)+
dbf d1,TitleScreen_ClrRam ; clear the RAM ($A400-A7FF)

lea (v_lvllayout).w,a3 ; RAM address for title screen layout
moveq #0,d1
bsr.w TitleScreen_LayoutLoad2 ; load title screen layout into RAM
lea (v_lvllayout+$40).w,a3 ; RAM address for background layout
moveq #2,d1
; End of function TitleScreen_LayoutLoad

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TitleScreen_LayoutLoad2:
move.w (v_zone).w,d0
lsl.b #6,d0
lsr.w #5,d0
move.w d0,d2
add.w d0,d0
add.w d2,d0
add.w d1,d0
lea (TitleScreen_Index).l,a1
move.w (a1,d0.w),d0
lea (a1,d0.w),a1
moveq #0,d1
move.w d1,d2
move.b (a1)+,d1 ; load title screen width (in tiles)
move.b (a1)+,d2 ; load title screen height (in tiles)

TitLoad_NumRows:
move.w d1,d0
movea.l a3,a0

TitLoad_Row:
move.b (a1)+,(a0)+
dbf d0,TitLoad_Row ; load 1 row
lea $80(a3),a3 ; do next row
dbf d2,TitLoad_NumRows ; repeat for number of rows
rts
Then, go to Level_GHZBG and below it, paste this:

Level_TS1: incbin "levels\ts1.bin"
even
byte_689D70: dc.b 0, 0, 0, 0
Level_TSbg: incbin "levels\tsbg.bin"
even

Finally, above Level_Index, paste this:

TitleScreen_Index:
dc.w Level_TS1-TitleScreen_Index, Level_TSbg-TitleScreen_Index, byte_689D70-TitleScreen_Index

And Tadaa! you have an alternate title screen bg layout! you can now edit the bg with no problems!

PS: When you complete this tutorial, you won't see any changes untill you modify it. And if i mistakenly did something wrong on the tutorial, let me know.

EDIT: Fixed the thread's title.
EDIT 2: Fixed up some writing issues.