I installed Cubecart 3 on a subdomain, as I have a store on the primary, and when I view the store none of the graphics display, only placeholders. This even happens when I upload a product, I see the picture I am uploading, but none of them display. Is there a php file that I need to add an extra path to. Any help would be appreciated. Thanks

I had that same problem. If you go to the url domain.com/store the images work, but store.domain.com will not load the images. Thik it might have to do with what you tell cubecart the location of your images are. (not sure)

Change the path in your admin - Settings-->General
It should currently look something like yourdomain.com/store
simply change it to store.yourdomain.com

I have looked and cannot find a path setting for the one you suggest. One says Absolute URL to store: the other says Server Root Directory: If I change the first, many more graphics dissapear. The second really doesn't do that much. Any suggestion? Only product pictures, thumbnails and the fck editor boxes. Any help would be appreciated.

Sorry....my bad...I was thinking in v.2.x terms.
I would have thought you'd be able to set the absolute URL to subdomain.domain.com and that would work...if ii doesn't, then I don't know.