Daz can open almost any poser format files... and also any obj. files (though you have to import them manually if they aren't poser/daz formated)...

To install new content...

1. open the file with winzip... if you look in the winzip screen you'll be able to see any included folders.... look for the one marked runtime and unzip that folder to my documents or where ever.... after that...

2. open the daz program folders  (for example C drive > Daz > Studio > Content) then cut and paste the runtime folder you unzipped to the content folder in daz... if everything has been set up properly by the file creator then it'll all go to the right place then on it's own....

3. start daz studio and have it search for installed content... if everything went ok your new content will be in the list for you to load and play with...

I hope this helps... :)