I've removed it before. Takes maybe 20-30 min if it's your first time. Less if you've had experience with other cars most likely.
It's mostly pop rivets and bolts. It helps if you've got a ratchet with a few extensions. This way you don't need to remove the wheel well when taking the bolts out from under them. (Also helps if you use the emergency trunk lift or some other lift to raise the car a few inches to get under the wheel well)
*edit* This is the diagram I used. (It's not nearly as complicated as it looks)
http://www.350z-tech.com/zwiki...moval