This generates really shitty smoothing groups that causes issues with pipelines that export smoothing groups. It's really easy to just assign 2 smoothing groups the a selection of polies and then pull one group off of each face on either side of the split.
It dose? thats a shame because it looks awesome :/ And thanks for the tips guys, tried it out and the 2 smoothing group thing works. Sure eats up a lot of time and effort though compared to the way maya dose things. But I guess thats the price you pay for having saveable smoothing group selections.