problem installing divinity 2

[Kuma-son]

sorry if this is the wrong place to ask I searched around a bit anyway..

I'm trying to install divinity 2,I mounted it(iso) using deamon tools(lite) installed it got the no-cd message when trying to run it.somehow it installs everything except a little bit on the fake drive so when I go to replace the no-cd thing it says the drive is full.
what I'm saying though is I have the no-cd crack and when I try to replace the original file with the crack it's saying there is no room.it says 16.2 mb of space needed.I tried just deleting the original file so I can put the crack in but it doesn't give me that option when I right click it.Usually when I install a game all the stuff get's installed to my computer's drive in this case its installing it all(except for a little bit of stuff) on the drive I made with daemon tools which is creating the problem and i'm just not that good with computers

I have reinstalled many times trying different things and when I try to put the no-cd patch in the crack folder this is what I get

(copy folder)

"There's not enough space on Divinity II you need an additional 16.3 mb to copy these files"

Divinity II
space free:0 bytes
total size:5.62 GB

should I just download it again from someone else?
any help would be GREATLY appreciated thanks in advance.