SkinDIA was a predecessor of mySkin and myKbd. In fact, if you go poking around in RAM on your device looking for myKbd, you won't find it. It's there as SkinDIA! for backwards compatibility reasons.
All you need to do to use the DIA skin is install it and then load it via myKbd. It will show up in the myKbd list of skins automatically. Load it and then go the the menus and merge your hex cell keyboard into it. If you load instead of merge, you will replace one skin with the other. Merging lets you combine features of various skins. You can get really creative doing that if you get into it.
'Fraid it's gonna be time to drag out the myKbd docs.
Oh, and before I forget, Leslie Franke has a crystal skin for ZLauncher that might be interesting to you also.