Don't think there's anything special with the cable - I got the 3 HDMI cable pack for R100 from makro when I bought the TV.
When your TV is connected to the xbmc, press MORE on your smart remote, then select TOOLS. On the tools screen, the first entry I see is set to Anynet+ (HDMI+CEC). Clicking this brings up a screen to toggle what you'd like to control (see attached screenshot).
Note that I didn't have to do this manually, the remote just started working as soon as XBMC was on.
Using the smart tv remote with XBMC did take a little getting used to since it has so few keys. Eg. Pressing the back key on the remote (labeled return/exit) brings up the context menu. To actually go back, you need to press and hold the same key. It works fine, you just need to get used to the keys. I've ordered the non-smart remote as well so it may be easier with that remote. Will find out once it gets here
When your TV is connected to the xbmc, press MORE on your smart remote, then select TOOLS. On the tools screen, the first entry I see is set to Anynet+ (HDMI+CEC). Clicking this brings up a screen to toggle what you'd like to control (see attached screenshot).
Note that I didn't have to do this manually, the remote just started working as soon as XBMC was on.
Using the smart tv remote with XBMC did take a little getting used to since it has so few keys. Eg. Pressing the back key on the remote (labeled return/exit) brings up the context menu. To actually go back, you need to press and hold the same key. It works fine, you just need to get used to the keys. I've ordered the non-smart remote as well so it may be easier with that remote. Will find out once it gets here