Updating wireless keys remotely

Hi,

We are looking at updating all of our wireless keys remotely using LANDesk, I have figured out how to do this on our older laptops Dell D820 and D830's which use the old WLAN utility but I can't seem to figure how how to do this with the new Dell controlPoint connection manager.  Does anybody have any experience with using SMS or LANDesk to do this, even inserting the key into the registry will work. 

With the WLAN utility all I need to do is copy the .wpn file into the system32 folder and the utility picks up the config changes, but this doesn't seem to work with the new xml files.

TIA!

Amy