so my situation is this --
i send a hi-res copy of all the images from my shoot, untouched, to my assistant via a zipped file that i put on my server. he imports these untouched files and edits them all in lightroom. he then exports and sends me the catalog w/ all the new develop settings he's applied to the images but not the images themselves since i have a copy of those on my computer. i try to import his catalog to apply to his develop settings to the set of images i have on my computer. but, even though the images have the same naming system, i cannot access the "existing photos" dialog in order to apply the changes.
what am i doing wrong? and is there an easier way to do this?