Redpine Modules Wi-i.MX51

I have a Wi-i.MX51 board and am using the Digi 5.7 toolkit. As I understand from the documentation, this board uses a RedPine wireless networking module.

By default, the redpine modules, rsi_master and rsi_client, are loaded on boot. I would like to know if there is a way to dynamically load and unload these modules while the system is running. In my setup, there is an external switch that controls the power for this module.

I tried to run the network pre-up script, but this casues a kernel crash.

Thanks.
Matt