GPS Sample code works, but how do you reduce power?

I got this project to compile and work:

I have the latest radio firmware at this time: 0.7.0_29.  I'm actually using a DK 0.8.2 which required an external antenna, but when I use one it works fine.

I measure constant current around 30mA when doing this. 

According to this, there seems to be 2 lower power modes below what this sample is using:

Also some information on lower power modes here:

Is there any guidance on getting the radio into these lower power modes?  Are these modes implemented in the radio firmware at this time?