"Simple" copy all and find and replace

For my program I need XML-Files, where nodes like PHOTO, IMG, FOTO, BILD, BILDCHEN should be renamed with the name IMAGE and the original name should be saved as an attribute "oldname".
The rest of the file should be the same. Just copy all and when the special nodes were found, rename them. I thought it would be really simple, but i tried some hours and had no good result. Maybe sombeody could help me.

Example for the original file:

<?xml version="1.0" encoding="UTF-8"?>

<Class>
   <Images>


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