The Handheld Config tool located in the BlacKberry Manager offers a way of upgrading the software on the Bb devices centrally. Simply double click the users PIN and you will be prompted with the Application Loader screen.
I believe you can set a bulk process to update a number of handsets rather than individually.
Please refer to http://www.blackberry.com/knowledgec...?nodeid=749962
or the BES V4 handheld guide.
Try this .... hope this works :o)