Sorry for the late reply.. been busy with other things heh. I've attached the modded MiuiHome.apk from MIUI 2.10.12
Using a rooted file manager overwrite /system/app/MiuiHome.apk with this one, set the permissions and reboot.
Added 6x6 and 6x7 layouts. I use 6x7 with 160dpi without issue so far.