I can do it in the HD version too, i forget mentioning dt-cancel/inferno-cancel too, which makes Frost fights much easier and is useful against Nelo Angelo, Nightmare (core) and Griffon too.
I know it can be made anywhere in the combo but after the two slashes seems the most effective for me as it stun locks most enemies and nelo in place til he breaks out of it and the timing is smoother to get used to the inferno cancel is handy too though
And it's not after two slashes only, it can be made anywhere in the combo as long as it is not the last hit of the combo (the double slashes, million stabs or that downard swing). You can use it even after Stinger, but it does not make too much difference.