Geez, you're right. It's been ages since I looked at V4's standard materials, but she's one of those that's really ugly in modern versions of Poser.

Looking through my runtime, it seems Poser 9 was the cutoff point. Some characters come with "standard" MATs and "SSS" MATs. The SSS MATs are labeled "Poser 9 and up" and don't have that green tinge, while the standard MATs do.

Maybe SceneFixer could help with this? It might be easier to edit that to work with Poser 12 than EZSkin. Since you wouldn't need to make new skin shaders if you only want to set the diffuse color to white on the entire figure.