- Download latest version xbmc-iplayerv2 add-on from code.google.com
Version 2.4.14 which I tested on XBMC v11.0 (Eden) can be downloaded from here.
- In XBMC got to System > Settings > Add-ons > Install from zip file
- Navigate to the downloaded iPlayer-v2.4.14.zip and install the plug-in
- Go to Videos > Add-ons where you will find a new entry called iPlayer