https://www.mixmods.com.br/2018/06/screen-overlay-imagem-sobre-tela.html

Screen Overlay.sc

// You need: https://forum.mixmods.com.br/f16-utilidades/t179-gta3script-while-true-return_true-e-return_false
SCRIPT_START
{
    LVAR_INT enabled

    IF READ_INT_FROM_INI_FILE "CLEO/screen overlay.ini" "Settings" "EnabledByDefault" (enabled)
    ELSE
        enabled = TRUE
    ENDIF

    LOAD_TEXTURE_DICTIONARY SCROVER
    LOAD_SPRITE 1 "overlay"

    WHILE TRUE
        WAIT 0

        IF TEST_CHEAT OVERLAY
            IF enabled = TRUE
                enabled = FALSE
            ELSE
                enabled = TRUE
            ENDIF
        ENDIF

        IF enabled = TRUE
            DRAW_SPRITE 1 (320.0 224.0) (640.0 448.0) 255 255 255 255
            USE_TEXT_COMMANDS 0
        ENDIF
    ENDWHILE
}
SCRIPT_END