There are few methods to apply a morph to Humanoid character... but only if you have an iClone with Morph Creator.

If you only have a CC4, it's not possible to attach a morph traditional way.
Hopefully RL would provide a full morphs support for Humanoids in CC one day.

But for now there is a workaround. Some of CC users have probably already figured this "hack" out.

So for those who are wondering...
You essentially may import any number of body/cloth morphs (created in 3-rd party app such as Blender)
simultaneously into Expressions without affecting Facial morphs.
And if you have an iClone, you may easily convert those into general animated morphs as well later on.





Updated...
Same thing only for CC3+ Standard Base characters: