After trying so many settings i decided to tweak the sweetfx settings on my own..i am still noob at this but getting hang of it..well i have been using this settings for long time but decided to release it now..let me know what you guys think about it..still tweaking it to my liking but looks like i have settled on this one..
Scroll lock to enable/disable..by Default its off so no laggy intro..

install:
copy all files in GTA5 folder..

Hope you guys like it..Enjoy

Works well on my amd 7970ghz edition..