HDR exposure bracketing with d300s versus canon7d

Setting up the d300s for HDR bracketed exposures I found you can set Cl or Ch (continous mode ) and hold down the trigger and it will take the set and then stop. Works for 3,5 or 7 exposures.

The canon 7d however can be set to take the brackets with a single momentary press ( very cool) BUT can only be set for 3 exposures ( not so cool).

Does anyone know if the Nikon can be setup to take all the shots with a single press and how?