Ok, let's take it from the top.
If you want to apply an entire theme (in this case the Iboni theme) you'll need WinStyle which you can get here -> https://www.stardock.com/products/winstyles/ BUT in order for WinStyle to apply all the skins contained in the suite, you'll need to download and install the application program for each skin.
Here is a list of the programs and the download link of each.
-WindowBlinds https://www.stardock.com/order.asp?product=Windowblinds
-BootSkin http://www.bootskin.com/
-CursorXP http://www.cursorxp.com/purchase.html
-IconPackager https://www.stardock.com/products/iconpackager
-LogonStudio https://www.stardock.com/products/logonstudio/download.html
-SysMetrix http://www.xymantix.com/sysmetrix/download.html
-Winamp http://www.winamp.com/download/
-WinMedia http://www.microsoft.com/windows/windowsmedia/en/default.asp
-Rainlendar http://www.ipi.fi/~rainy/index.php?pn=projects&project=rainlendar
Once you have download and installed all there programs, download the Iboni Suite and use WinStyle to apply all of the skins.
**Keep in mind that some of these programs are freeware and others are demo/trial versions and you will need to purchase them after the trail time expires. Also, the trial versions dont allowe you to use or see some of the features.
I hope this helps