Acadia has been at this longer and is more on top things than I, but I did it another way and it worked out fine. I installed V4 to her own runtime, I just used the daz studio option. I used the poser option for all the morphs after that. Once everything was installed I ran the .dat file from inside that folder just to make sure (that's all that short cut for updating v4 on your desktop does anyway).

I'm not sure what redundant files your talking about, if it is the Daz Studio files than you can always move them to another file until your sure you don't need them. But keep that !Daz folder in the right place, as well some add on products great similar folders.