You can improve the HD Head morphs when using the Poser DSON importer as long as your PC has enough memory.

It won't give be the same results as Daz studio but it will improve Portraits....

Daz only provided 1 level of subdivision - so just create a second level.

Go to Runtime/Python/poserScripts/Scripts/Menu/DSON Support/SubDivision

copy the file - Set SubDivision Level 1.py

rename the file - Set SubDivision Level 2.py

open it in a text editor.

go down to the bottom where it says -

if param: param.SetValue( 1.0, 1 )

and change ( 1.0, 1 ) to ( 2.0, 1 ) and save the file

all done.

Open poser, load Genesis8Female - On the main menu - Scripts - DSON Support - SubDivison - Set SubDivision Level 2.

The HD morphs will now show better detailing.

I haven't found a way of going above level 2 as I don't know the switch that tells DSON to turn of the limits within the DS core in the same why that you have to in Daz Studio.

Anyway, hope it helps