[Trinket]

Back on alpha 4 (or maybe 3) I tried doing that, my script just set "renice 19" and "ionice idle". Even with that I couldn't play DTS (I even had problems doing so with xbmc process alone) that's why I did this script.
But probably now, with all the great progress that XBMC has achieved it's possible because even with the most demanding videos I still get like 80-85% cpu usage.
Anyway, the problem is that the only difficult part is maybe setting sudo no-passwd and that part would still be needed.