xbmc show nvidia gpu temp with nouveau

… is a bit tricky but I made it:

<advancedsettings>
 <cputempcommand>sensors|sed -ne "s/Core 1: \+[-+]\([0-9]\+\).*/\1 C/p"</cputempcommand>
 <gputempcommand>sudo nvclock -T | grep -oE "[0-9]{1,}[C,F]" | sed "s/C/ C/g" | sed "s/F/ F/g"</gputempcommand>
 </advancedsettings>