Hi Kichute
You want software update v1.4, for Black Ops you want turbo knife mode 2. Just equip with semtex, turn on turbo knife, go to mode 2, and then push your stick to knife like normal, it will be faster.
On auto sprint, turn on auto sprint, then flick the aim button while walking forward to start sprinting.
Have you downloaded the windows USB software yet, it has the best instructions of all inside the software itself.