First time posting...and new to zenphoto. I have a question..I would like to use the default theme but the only thing is that the full images open without a border frame. All other themes open full images with border around them. Can anyone advise me, thx

The full image link is simply a link to the actual image file. If you want to style it you will have to create a new script (a custom page in Zenphoto's terms) and change the link to point to that page passing the album and image information.

If you mean a "border" you maybe see the Colorbox plugin display. All standard themes should support that but you need to configure its plugin options accordingly.