The rainbow stripes thing I have enountered before when I was using P5 (I use P6 now, it is much less painful) .. the problem comes from the texture either being too high of resolution or from it not being in the right power (1024, 2048, 3096 etc) but it sort of went interchangable on which it was. For the scial expressions there is a few expression sets around but I normally use the one at DAZ or just do them myself :)