I have Windows XP. I closed PSE 4 and went to Hard Drive C:>Program Files>Adobe>Photoshop Elements 4>Plug-ins>file formats. I removed the old 8bi to my desktop and downloaded Camera Raw 3.7 zipped file into the file formats location. But upon opening PSE 4, it still won't open my NEF files from my Nikon D200. Any suggestions. I was going to purchase upgrade of PSE6 but will that make any difference. Shouldn't it work in PSE4?