New race animations with extra bones (e.g. with wings) could be not that easy to create using Blender for PC first person view.
In case I understand Melian correctly it is possible to create only working MW kf files. However, for the new race it is obligatory to create (may be, modify in NifScope) a new skeleton nif (x.nif). First person skeleton has several peculiarities (specific NiNodes) that can be exported correctly only with original MW Max exporter.
Moreover, it would be necessary to create completely new base_anim.1st.nif and base_anim.nif animation files with hundreds of required in MW sequences. Oshiel has found the way how to "attach" new base_anim (third person view) to PC, but it is not clear how to implement new base_anim.1st.nif.
There are also many other limitations like hardcoded bone names, collision propagation structures, etc. TheDaywalker, I assume you know all these details.
This is a tremendous amount of work and I do not think that this is doable. The best solution IMHO for a winged race is animated (partially) body/armor/clothes parts. There are several excellent examples of that available in the mods.