CFGs:

MSAllenBigWeaponMissile.cfg : Auto Palette Assignment
MSAllenBigWeaponMissileMA.cfg : Manual Palette assignment
MSAllenBigWeaponMissileNA.cfg : No Palette assignment

Constants:
In the ".asm" file you can change this:

!ExplosionNumber = $06  ;Metal Slug Explosion Index used in Pixi
!SmokeNumber = $08      ;Metal Slug Smoke Index Used in Pixi

SFXs:
In the ".asm" file you can change these values to changes SFXs and if use 1DF9 or 1DFC:

    !ExplosionSFX = $74
    !ExplosionSFXAddr = $1DF9|!addr

Extra Byte 1:
    E PPP VVVV

        E: 
            0 => Palette is not affected by Global Color Palette Effect System
            1 => Palette is affected by Global Color Palette Effect System
        PPP:
            Palette used by the sprite if uses Manual Palette assignment or No Palette Assignment
            000 => Palette 8, 001 => Palette 9, ..., 111 => Palette F
        VVVV: Color Theme

Extra Byte 2:
    Format: SSSS TTTT
        SSSS: Speed
        TTTT: Time before homming movement

Extra Byte 3:
    Format: TTTT PPPP
        TTTT: Time before fall
        PPPP: Initial Pose (0: 0000 => 0°, 1: 0001 => 15°, ... , B: 1011 => 165°. Higher values are invalid)

Extra Byte 4:
    Format: -L GG TTTT
        L: Local Flip (0 => missile go from angles between 0 and 180, 1> = missile 180 and 360)
        GG: Global Flip (probably you dont need to use it, just use 00)
        TTTT: Time between each angle change during homming movement
