Good news:
I found a very excellent IFF/ANIM player on PC at last.
If you want, please point to:
http://www.randelshofer.ch/multishow/download.html
"MultiShow" is a java program for free, and can show a varied of files such as AIFF, MOV, AVI, JPG, PNG, TXT, RTF as well as IFF/ANIM files. If your IFF/ANIM have not an extension or have a wrong extension, this program can play it none the less!