It's time-consuming hard work. First, let's see how you can install it for a single user.

1. Create a directory for the GreenVille icon theme:
mkdir -p ~/.kde/share/icons/greenville/{16x16,32x32,48x48,64x64}/{actions,apps,devices,filesystems,mimetypes}

2. Create an index.theme for it. The simplest way to create an index.theme is to first copy the index.theme of crystalsvg into
~/.kde/share/icons/greenville
and then edit it. You edit it by changing the Name field to GreenVille and changing the Comment field to something like Icon Theme by Dirceu Veiga, Fast Icon Studio. Delete the translations of Name and Comment.

3. Populate ~/.kde/share/icons/greenville by copying Dirceu's icons into the appropriate subdirectories.

4. Rename the icons using standard KDE icon names, e.g. change the name of home.png to kfm_home.png in the apps directory and to folder_home.png in the filesystems directory.

You can make the icon theme available system-wide by copying the greenville directory from ~/.kde/share/icons into KDE's icon directory, which may be in /opt/kde/share/icons or /usr/share/icons depending on which Linux distribution you use.

this is not a full theme..
you can install from kcontrol only full icon -theme...
with theese you can replace some icons you've just installed..

When I install this theme it gives a error

The file is not valid
or somyhng