Its worth a try, if you used the stabiliser you are best off rehydrating the yeast to give it its best shot i did this years ago when i put the stabiliser in instead of the yeast at the beginning it took a little longer to start but it got there in the end.
He says heat the water to 105F (40C) i think that's a little high i would aim for 30C max.
I used tap water and it was fine.