It works on ALL ROMs
Did u used RootExplorer for directing you to /system/media?
I'm pretty sure you should see your current bootanimation.zip
I'm gonna check that asap.
Please give me some more information
I'm using this ROM: http://xdaforums.com/showthread.php?t=1967851
and I used root explorer to look for it, but I didn't find it, if you need more information tell me.
Thanks.
Sorry for my english.