Take your time moving your stance out. A wider stance is tougher on your hips when you're squatting raw. For your ab/core work, add in some spread eagle situps and standing rope ab pulldowns with your hams against the pads of a pulldown station to activate your hip flexors. That should help some with the wider stance.
ahh ive read a couple places that squating a lil wider then shoulder width is ideal for raw squatters? I widened my stance a bit im about to post a picture in another thread to see if im getting low enough.