PLEASE goodsir!, You will NOT regret using CGminer!!!, I procrastinated from using it for MONTHS, And to this day i regret all those days that i wasted staying with GUIminer, Trust me dude, CGminer is DEFINITLY what you want Use that, Or Since you have a 7970 Diablo Miner,
CGMiner!!
CGMiner!!
CGMiner!!
CGMiner!!
It will pick all the settings and do everything for you once you get it running!, Seriously! Use it!
https://ozcoin.net/content/win7-cgminer-setup-guideis a guide to cgminer with a .bat file
-I 9 -k poclbm --auto-fan --gpu-engine 1100-1180 --auto-gpu --gpu-vddc 0.87 --gpu-memdiff -150
gets me 700Mhash/s per card
hope thats a help

Nevermind... tweeked AB a little bit and got her up to 700 range.