Yes, it used ux theme patcher and then changed a lot of system files, like explorer.exe, shell32.dll,user32.dll and many more. I downloaded them from
You Must Be Registered and Logged On To View "URL" BBCode Contents...
which is a reputable and trusted place from where I download all my customizations. But the problem is that whenever I install softwares like Opera or Chrome it gives me an error, saying shell32.dll or user32.dll relocated etc etc. So, everytime I get that error I rewrite those two files with the original ones that I backed up earlier. And after installing this again I rewrite the originals with the ones that came with theme.

Anyway, my system is now looking like Mac OSX leopard with which I am happy (As I am bored with the default themes). BTW, is there any free alternative to Windowsblinds?