Always be able to view in fullscreen

[recman]

I have set my intermediate pics to have the max size of 700 pixels. Some pictures that I upload is 700 pixels or less and some are bigger than this (CPG makes a resized copy). If the uploaded file was bigger than 700 pixels and I click the intermediate pic a fullscreen window is showed with the original sized pic. But I cant click on a pic that was 700 pixels or less when uploaded.

But now I want that I also can click those pics (700 pixels or less at upload) so that they can be viewed in a seperated popup. Can this be done?