When I switched, I simply replaced CGMiner/SGminer on all my rigs with SPH-SGminer with the X11MOD and tried my normal settings, which with a couple exceptions, worked to get me running. I then went through and tweaked the intensity (13 up to 16 for most 7970s), and played around with many other settings to get at least 4x my Scrypt hashrate, more in many cases.

If you do the above, and find it is not working with the rig, simply reduce the engine settings, and try again. I did this with 50 rigs, so you should be fine if you have less.