Anyone know what's up with HDT SMP for SSE? I figure it'll need a new .dll and updated NIF files right?
I don't know where you heard that Oldrim UUNP Slidersets won't work in SE-Bodyslide. Everything about the UUNP body works fine in SSE, including Outfit Studio and BodySlide functionality.
Here is how to do it:
Once you have done the above, which takes no more than 5 minutes, you will be able to use SSE Bodyslide to create and modify all that UUNP goodness in SSE.