Now for all coming tools, I created a SVN repo at SourceForge:
http://sourceforge.net/p/wvtools/code/

in the basefolder you can find now tools for Wipeout Fusion:

WOFExplorer

Get your PS2 game DVD, put it in the DVD drive and open the FILESYS.WAC file in WOF subfolder. Now you can browse the game content and extract files by double clicking on them (notice that it will ask for FILESYS.WAD where the actual data is stored)

MUNViewer

well MUN files are texture files, BGR encoded and swizzled/tiled with 16x16 tiles, this tool can display them. Also you will find "test.tga" after you opened a files in the exe's directory, which contains the image as tga format

greetz WV