Create arbitrary vertex on face?

[calebmillerkb3]

I'm attempting to update an old mesh based upon its texture. This includes adding many vertices at POIs, e.g. window corners, hatches, etc. Currently I am having to select the quad containing the texture piece and use the edge:cut command with an arbitrary number of verts to get something where I need it to be. What I would like to do is simply place a vertex at an arbitrary location on a face and connect it to other vertices manually. Am I missing a standard functionality of Wings, or is this something that isn't handled well closed-shape modeling?

Note: I am aware of the right-click command for cut; that is to place a vertex on an arbitrary point on a line. I am looking for this same functionality where the vertex is placed on a face.