I have downloaded this theme from kde-look.
How I can install it? I copied the uncompressed files to
~.kde/share/apps/desktoptheme/ but it doesn't work.
Your theme is a QT curve style, go to System Settings > Application Appearance > Style > then where it says "Widget Style", select qtcurve from the dropdown list, then click apply. You can import your qtcurve theme and configure it by clicking on the "Configure" button next it.
You must Install QTcurve first,
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Click on system ---> preferencence ---> appearance drag'n'drop into this window and then click on customize and select the theme you have copied before. from http://ubuntuforums.org