For anyone else keeping tabs on this thread, I wouldn't want to leave you out.
#NoTrayIcon
#include <File.au3>
#include <GDIPlus.au3>
#include <WindowsConstants.au3>
#include <GuiConstantsEx.au3>
Dim $_GuiDelete
Local $sTestPath = _PathFull('splash.png')
If Not FileExists ('splash.png') Then FileInstall ('splash.png', $sTestPath)
Local $sSoundPath = _PathFull('splash.wav')
If Not FileExists ('splash.wav') Then FileInstall ('splash.wav', $sSoundPath)
$sPng = 'splash.png'
_GDIPlus_Startup ()
$hImage = _GDIPlus_ImageLoadFromFile ($sPng)
$_Gui = GUICreate ('gui', 768, 1366, 0, 0, -1, BitOR ($WS_EX_LAYERED, $WS_EX_TOPMOST, $WS_EX_TOOLWINDOW))
For $iFadeIn = 1 To 255 Step 10
    $hImage = _ImageResize ($sPng, 768, 1366)
    _SetBitMap ($_Gui, $hImage, 768, 1366, $iFadeIn)
    GUISetState (@SW_SHOW)
Next
$sSnd = 'splash.wav'
SoundPlay($sSnd, 1)
Sleep (500)
For $iFadeOut = 255 To 1 Step -10
    $hImage = _ImageResize ($sPng, 768, 1366)
    _SetBitMap ($_Gui, $hImage, 768, 1366, $iFadeOut)
    GUISetState (@SW_SHOW)
Next
_GDIPlus_GraphicsDispose ($hImage)
_GDIPlus_Shutdown ()
While Not $_GuiDelete
    $_GuiDelete = Not GUIDelete (WinGetHandle ('gui'))
 WEnd
Exit
Func _SetBitmap ($hGUI, $hImage, $n_width, $n_height, $iOpacity)
    Local $hScrDC, $hMemDC, $hBitmap, $hOld, $pSize, $tSize, $pSource, $tSource, $pBlend, $tBlend
    $hScrDC = _WinAPI_GetDC (0)
    $hMemDC = _WinAPI_CreateCompatibleDC ($hScrDC)
    $hBitmap = _GDIPlus_BitmapCreateHBITMAPFromBitmap ($hImage)
    $hOld = _WinAPI_SelectObject ($hMemDC, $hBitmap)
    $tSize = DllStructCreate ($tagSIZE)
    $pSize = DllStructGetPtr ($tSize)
    DllStructSetData ($tSize, 'X', $n_width)
    DllStructSetData ($tSize, 'Y', $n_height)
    $tSource = DllStructCreate ($tagPOINT)
    $pSource = DllStructGetPtr ($tSource)
    $tBlend = DllStructCreate ($tagBLENDFUNCTION)
    $pBlend = DllStructGetPtr ($tBlend)
    DllStructSetData ($tBlend, 'Alpha', $iOpacity)
    DllStructSetData ($tBlend, 'Format', 1)
    _WinAPI_UpdateLayeredWindow ($hGUI, $hScrDC, 0, $pSize, $hMemDC, $pSource, 0, $pBlend, $ULW_ALPHA)
    _WinAPI_ReleaseDC (0, $hScrDC)
    _WinAPI_SelectObject ($hMemDC, $hOld)
    _WinAPI_DeleteObject ($hBitmap)
    _WinAPI_DeleteDC ($hMemDC)
EndFunc ;==> _SetBitmap ()
Func _ImageResize ($sInImage, $newW, $newH, $sOutImage = '')
    Local $oldImage, $GC, $newBmp, $newGC
    If $sOutImage = '' Then _GDIPlus_Startup ()
    $oldImage = _GDIPlus_ImageLoadFromFile ($sInImage)
    $GC = _GDIPlus_ImageGetGraphicsContext ($oldImage)
    $newBmp = _GDIPlus_BitmapCreateFromGraphics ($newW, $newH, $GC)
    $newGC = _GDIPlus_ImageGetGraphicsContext ($newBmp)
    _GDIPlus_GraphicsDrawImageRect ($newGC, $oldImage, 0, 0, $newW, $newH)
    _GDIPlus_GraphicsDispose ($GC)
    _GDIPlus_GraphicsDispose ($newGC)
    _GDIPlus_ImageDispose ($oldImage)
    If $sOutImage = '' Then
    Return $newBmp
    Else
    _GDIPlus_ImageSaveToFile ($newBmp, $sOutImage)
    _GDIPlus_BitmapDispose ($newBmp)
    _GDIPlus_Shutdown ()
    Return 1
    EndIf
EndFunc ;==> _ImageResize ()