What do you use the FST tab for in Wiird?
It's the game's file system tree you use it to view the contents of the game like you would in wiiscrubber you can also swap some files and you can find where the filename is stored in memory
heres a little program Fst Address viewer which makes it alittle easier for making file replacement codes
http://wiird.l0nk.org/forum/index.php/topic,3519.0.html