Two Worlds II DVD9 to DVD5

[Dx30]

Hello
I am definitely not trying to BUMP this thread <--- lie xD
Anyway i am done with the game now, took me about 50 hours, and i don't want the game to sit on my pc till someone makes a conversion for me.... so i have decided to make one myself. This is the version of the game i am talking about http://www.gog.com/gamecard/two_worlds_2_epic_edition
Using yener's CI Designer 0.4 making the installer is possible thx to his tutorial . I can make buttons with this site http://dabuttonfactory.com/ and the internet will provide images. It will not be the best looking installer but it will serve its purpose.
What i need help with is the actual compression of the game. The installed game is 4.87 gb big and all other languages are already removed. What do i use to try to compress it? Is there a tutorial somewhere? Some help would be appreciated. Is my first conversion
P.S. sorry for the wall of text