1 I would just install the content into poser 6 again, that way it will be less likely that any mistakes happen.

2 You can`t copy files made for daz studio into poser, they are different formats.

3 I just had an idea, if you installed the things into daz studio using the standard poser directories you could use the add runtime feature in poser 6 to make the things work.

I would try number 3 first.