No. He puts the frames groups side by side and uses them as if the groups did not exist. At one time the otclient was with an animation bug, and the way I found it was this one.
If OP or anyone is interested, these are the basic edits in sources to get frame groups working for real
http://www.padventures.org/jano/otc.rar
i compared the files and minimal changes were made, anyway im gonna test