Patching gameforge with Gamezaion ?

I have left a thread about me having problem with downloading with NCSOFT and some members helped me out (Outlaw and Kyle) thank's,
Any ways they helped me out to figure a new EU client of aion called Gameforge, how ever after am done downloading 9 stages with 31 Giga game (Of course with install file) i wanna know how to patch to gamezaion i followed a guide but i feel am doing something wrong.

The guide says that i Delete gameforge luncher and copy Aion into NCsoft luncher aion folder that is created after i let it download for few sec then close it,
I did this and copyed it inside and replaced every thing needed and deleted Alb1on folder .. How ever when i clicked NCSOFT to repair as it's last step in guide before i patch to gamezaion it asked to repair 4 Gigabytes.. i thought this is kinda weird since game is already downloaded Full .. So why do i need to download 4 more giga bytes ? ...Also i hope i done all steps correctly if there is any thing suspicious in what i wrote please let me know i wanna play gamezaion again xD. my spirit master is waiting for me to PvP the other SM Death again.