You're still doing quasi-high bar.
There is nothing wrong with sticking to high bar (I find the movement feels like it makes more 'sense', but this means keeping your chest up and working your bum between your hips.
Low bar, you'll need to sit bar a lot more and get the bar lower onto your rear delts and traps (it should hurt like anything when you first find the right position, because it's not used to having a bar sit there).
Watch one of LiE squat videos in his log and you'll see great examples of low bar squatting. Same applies to icecold, too (there are plenty of other examples of great squats, but these two have very obvious and clear technique).