MD5 Model in DX10

I port my md5 loader code into my dx10 engine.I optimise it a little bit and I made a few modifications for example I calculate normal weights instead of recalculating all normals after creating an animated pose.Still I have to do the same thing for the tangents and as far as I know it has to be done the same way as the normals.This means I have to calculate the tangents from the bindpose vertices ,rotate them using the joint quaternion and then create the tangents weights and finally get their weight sums during the animation.