Im going to go out on a limb here and say there might be some info on this in the Malting Gluten Free Grains
There's somehting in this link too: http://www.homebrewtalk.com/f164/grain-roasting-160747/
But anywas, here is what I follow when I roast grains. Rinse the grains and get rid of any hulls or bits that shouldn't be there. Place them on a roasting pan and put it in the oven at 225-F for about 30 minutes, increase temp to 250-F, stir grains, and wait another 30 minutes.
You increase the temp 25 degrees every 30 minutes until you get the color you get the color you want. You could probably just throw them on a pan at 400 and keep checking but I like the slower process since it keeps me from going overboard.
Make sure you let the grains waft for at least a week before using them.