I haven't used V4 for ages, but from memory when installing some morphs there are dependencies and a popup that asked me to activate the morphs. This was for Poser and I haven't used V4 in Daz Studio.
I've made a pack of some V4/4.2 stuff I have that might help. Some files need to be extracted as they are .exe files. I've scanned them and they should be safe to run. If you have V4 installed properly you should be able to tell the .exe where to install them, or you may be able to extract them to a folder on your desktop. Make sure you install the Poser files, not just the DS files. Good luck.
I still mostly use Vicky Fourpointtwoplusplus because she has more clothes, hair, jewelry, shoes (yum!), poses and expressions than all the Genesis bimbos combined. She also has a wider VARIETY of items than any other figure. Then there's the benefit of loading instantly.\