In the case of the head, as above mentioned, you'll be breaking all the head morphs.. so in other words, you'll have to totally rebuild all the headmorphs for your hair morph trick. I did something similar with Grrrl for Girl. I morphed her head shape into "hair", and relyed on the head texture to "carry" the effect. But modeling prop hair is much better, and adds much mor versitality.

Way too many people take way too many things way too seriously.