no matter I’ve worked it out.
its pretty simple when you know what your doing
(easy to say now I know
)
any way all you have to do is export each of your morphs as separate OBJ’s and use the select shape tool in XSI to combine all those shapes into a single model for animating.
main things to be aware of:
vertex number/order must stay the same (I think this is why I could not get it to work before)
and the models need to be the same size XSI does not seem to like different scales so import/export at the same scale (this may be because the vertex order gets change at different scales not really sure, all I know is it does not like it)
I might write a quick tutorial if I have time, if not ill post up a better explanation later for any one with the same problem.