Show only one thumbnail in my View with CCK+Imagecache+Lightbox2+Imagefield Gallery

Hello,

I have a content type with a CCK imagefield using imagefield gallery and lightbox2 to display the images but I just want to display one thumbnail in the View and the in node.I want see the rest of the image with lightbox slideshow but when I go to my views and trying the image field that "Show first value only or show last value only" doesnt work.

How can I do that?

Thanks