Best way to rotate a WPA key on a bunch of laptops?

Hello. I have a need to rotate (replace) the WPA encryption key on

about 50 laptops.

Is there an easier way than logging into each machine remotely and

replacing the WPA key?

I currently do not use a radius server for wireless access. I noticed

somone linked to this utility in

another message. http://www.nirsoft.net/utils/wireless_key.html

Will this work for replacing keys?

Thank for any info.

Doug D