Can anyone tell me the easiest way to remove and replace the shift knob on a 2008 Boxster? I have the Special Edition model and it's got the Alcantara knob which had gotten a bit rough looking. I ordered a new one and don't want to ruin it. I'm sure it's simple but it appears I may need to remove the boot. It doesn't seem like it just screws on like my other cars. Also, same question on the stereo knobs. Do they just pop off or is there a secret? Thanks much!