At first, this may seem to get into the gears of the thing, but it is not difficult.

Use the program PMDedit. 

New - add Poser - navigate to the !DAZ folder and find the INJ deltas files. Select all or leave out these that you will never use.  Save as ***.pmd and make FBM INJ/REM poses before you save the final time.

I do not know how to do a group node tree inside PMDedit. The present method does not default, so each morph is assigned its node individually (tedious for a lot of morphs).  But for V4++ the group node tree already is.  The existing group node structure can be copy/pasted into the ***INJ.pz2 from a V4++ cr2.

No more initialize problems.  If you do not wish to use multiple INJ poses, the ***.pmd can include additonal 3rd party morphs.