Startup Screen Plus Loadingscreens

Installation:
open openiv and enable edit mode (better backup your files before doing any changes)

Replace all files except LoadingScreen_Startup.ytd in the following folder:
GTAV\MODS\UPDATE\UPDATE.RPF\x64\DATA\CDIMAGES\SCALEFORM_PLATFORM_PC.RPF

Replace the LoadingScreen_Startup.ytd file in the following folder:-

GTAV\MODS\UPDATE\UPDATE.RPF\x64\DATA\CDIMAGES\SCALEFORM_FRONTEND.RPF

And enjoy : o )