I'm currently using
<img width=35px src="{.if|{.filesize|%item-resource%\folder.jpg.}|%item-url%folder.jpg |/template/{.!theme.}/images/icons/folder.gif.}"/>
in Live 3.0.1
If folder.jpg is not found, then default folder.gif will be used.
I wanna make it look for folder.png also since some mp3 files was embedded with png instead of jpeg. It basically look for folder.jpg first, if it's not existed, look for folder.png, if both jpg and png are not avail, use default folder.gif.
Thanks in advance