It's quite easy really. I'm assuming that you have the wheel cover.
Open tail gate and reach into the cargo pocket on the inside. You'll find a large plastic nut in the middle, unscrew it until it comes off. Close the tail gate, and the cover should pull straight back (you may have to jiggle it a bit). There are 3 standard wheel studs that hold the wheel on. To put it back on reverse the process. Don't worry if the cover doesn't go all the way on, you can use the nut to pull it home.
Hope this helps you out.
PS It's pretty easy to change the wheel (the lock nut adaptor is usually with the jack under the carpet). Dont bother putting the puntured wheel back on the gate, but put it in the boot instead (assuming you have the room).
Last edited by Pat.w; 28th June 2007 at 05:24 PM.