Any one know how to get ultimate breasts morphs to work in Daz Studio 3?
TIA

can you provide a link to this morph set please, then i may be able to help you

If you are talkiing about the morphs that give them a very large sized bust.  I just tried them out and they work fine. Are you sure you're using the right ones on the right model version (Something I tend to do alot).
Moilly
  I think they are talking about these
http://www.renderosity.com/mod/freestuff/search.php?section_id=-1&query=Ultimate+breasts&sort=relevancy&use_age=no&older_age=&older_units=day&newer_age=&newer_units=day&username=&section_selector%5B0%5D=-1

That's the link to them I downloaded UB 8 for V4.2. I read the read me and placed them where it said to. when I go to use them they do not show up.
RuntimeLibrariesPoseUltimate Breasts Vic4
RuntimeLibrariesPropsUltimate Breasts Vic4

After trying some time I clicked in the torso area and dragged one set from the folder and that worked.

ok i downloaded the ub8 unziped it and dropped the runtime folder into my runtime folder
loaded v4 then went to poses  and injected the first one in the folder
i then clicked on parameters/community and moved the dials and they worked.

The image is the folders I have under programs. The runtime I think is in the DAZ folder.

If you are using DS 3 then your content shouldn't be in the application folder but in your documents folder, DAZ3dStudio 3Content as I recall. You can check this by going to Edit>Preferences>Directories, clicking at the top ("DAZ Studio Content Directories") and picking Poser Content Directories from the menu - any of the folders listed there will be OK to place the Runtime. Also, if you are using the content manager you will need to do a search to add the new files to the database, or to add them manually (in the Content palette, click the triangle button at top-right: if the tick is next to one of the View folders as options hit Esc to cancel, or click away from the menu, otherwise pick one of the View folders as options; you should now see entries for the folder(s) listed as Poser content directories in the palette in which you can locate the new items, as described in the readme, and you can right-click and choose to add them to a category so you can find them in the content manager).