If there's any Special Edition players (like me) here at Chorrol that yearn for Immersive Weapons, this guide works well.
Took me about half an hour (and I'm completely new to all that) and it seems to have worked well. I'll know better after I play for a few hours, but the Antique Iron Sword showed up for me right away in the forge menu.
Nope, because the full version of IW requires SKSE - which still isn't out, and may never be out. The guide I posted walks you through removing the Dwemer Control Rod, since that is the only thing in the entire mod that actually requires SKSE.