The decals forum is in the Tools, Techniques and Reference area, below the Modeling Subjects area.
The new super thin decals require a new method of application. Do not take them off the backing paper and try to transport them to the model. Rather, place the decal and backing paper on the model in the place where it should be located. Slide the decal slightly so that a small portion of it leaves the backing paper and you can hold that edge in position (with sharp tweezers, knife tip, or whatever). Now, grab the area of the backing paper with another tweezer on the opposite side where there is no decal film, and pull the paper out from under the decal. Yes, I know that sometimes this requires three hands, but that is the way to do it. If you try to pick up the decal film and hold it suspended, it will warp or curl, often back upon itself!