Hi, Netherworks! You know what's ironic? I use your V3 joint setting pose more than my own. Mine's better suited to making new clothes, since it sets the fall-off zones as well. Yours is nice for working with pre-existing clothes.
Thoughts on messing with the WAM hair. I'm pretty sure you can leave the obj alone. Pop that puppy open in a text editor so you can see what I'm talking about. I'll walk y'all through how I'd set this puppy to only conform at the head.
First of all, meaning no disrespect to DAZ at all, someone was very sloppy with this CR2. They popped the hair into a pre-existing one, and just left all the extra body parts in. So, every body part that doesn't have a geometry call-out: kill it. Leave the actor Body section and delete the rest of the blank ones. Now, change the "actor chest:1" to "actor notchest:1" and "actor neck:1" to "actor notneck:1" or some other names. It doesn't matter as long as you're consistent.
Now, scroll down to the parameter sections and kill every body part except head, neck and chest. Rename the actor lines again, and leave the internal stuff on those the same.
Scroll down to the figure section. Join me in writhing in pain for a moment.
Now, find the lines "addChild hip:1 BODY:1" and change hip1 to notchest:1. OR, if you want to try from the head down, change it to head:1 and then flip the addChild callouts so that notneck is a child of the head and notchest is a child of notneck. Delete any addChild line that includes bodyparts that are not head, notneck, or notchest.
Next, kill those inky chains. Kill them now, kill them lots. Why are those even in there? Well, I know they're in there because they were in whatever CR2 DAZ started with, but they shouldn't be in there.
Change "defaultPick hip:1" to "defaultPick head:1"
Save under a new name in case we broke something.
And give it a shot. Tell me if it works; I'm too lazy to do it myself. ^_~

And I haven't even had my first dose of caffeine. ^_~