MPS3 with FreeRTOS


I just purchased an MPS3 board and want to run FreeRTOS. Any tutorials on how to get started?  ARM/Keil shows a ARM.CMSIS-FreeRTOS.10.0.1.pack download on their website, but it appears to be just the standard FreeRTOS download in a zip file with a .pdsc file included (no idea what's in there).

What do I have to purchase, or where do I look?  I would prefer to use GCC toolchain, but will use Keil if I have to.