-Make the proper deformations in wings or blender, export as obj.
(avoid adding or removing any verts since it will break compatibility with the existing version of the mesh)
-In Open brf select the mesh you wish to add the vertex frames to, Then Import> Vertex-animated Mesh Frame, (choose your newly created obj of course).
-This will add another frame, so you will have frames 0 and 1
-Because the female frame is at frame 2 you need to either import the same vertex frame again, or much quicker Ctrl-Alt-C *copy mesh frame Ctrl-Alt-V *paste mesh frame
The number beside the frame is a time code, they should be
frame 0 time 0 *male frame
frame 1 time 10
frame 2 time 20 *female frame
I have no idea what frame 1 is for...seemingly nothing.