To elaborate and possibly clarify, first wort hopping refers to adding hops to the first runnings you collect from the mash tun. It's an older German brewing technique that has become popular again recently. First wort hopping results in about 10% more IBUs compared to a 60-minute addition, but the perception of that bitterness is much smoother and less intense. There is also a bit more aroma carry-over from a first wort addition than a regular 60' addition.
So, with a BIAB system, you would add the hops to the kettle after you lift the grains out, and leave them in there while rinsing/squeezing the grains, and on through the entire boil?
This would be in lieu of the 60 min addition?