Hiro Toon 4 is a custom morphed character for Hiro 4 so no additional DAZ morphs are needed. You simply load Hiro 4 from the DAZ People folder in the Character library, go to the Pose library where the Injection morphs for Hiro Toon are located. Select Hiro 4 base and then double click on the face and body injection pose. That should inject the Hiro 4 Toon character.

Oh, and here is why the faces won't work. This product http://www.daz3d.com/i/shop/itemdetails/?item=4571 is for Hiro 3. Hiro 3 is an entire different figure and products for this version are not compatible with Hiro 4.   

You can find Hiro 3 here:

http://www.daz3d.com/i/3d-models/-/hiro-3-0?item=3226&spmeta=rq&_m=d

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