I typeset a journal for my son's school (using Quark). Most of the contributors supply text and photos. But one has started pasting his photos into Word, and then claims I don't need the actual image files. I've told him I do, but am I right?

I could copy the image from Word, make a new file in Photoshop to the required resolution and colour space and paste it in, then save as a tiff or whatever and import into Quark. Or I could just copy from Word and paste into Quark, which surely would be a bad Thing?

Even if I can manage without the image files, surely the printers will want them He says all the information needed is there, but he will, reluctantly, try and find the photos and send them.

What techie arguments should I be using?