Apparently ripping textures from PS2 is a nightmare compared to easy street Wii/GC. Aside from not being able to rip from the files directly (because apparently every game has its own proprietary format) ripping from runtime was an option, which is a really poor way to do it, in my opinion. It's the equivalent of screenshot ripping sprites, which really misses out on the bigger picture and subtleties.
Despite that, I've managed to collect relevant textures for MegaMan in the game. No way I'm ripping stage textures with these convoluted tools. Download MegaMan Textures
Previews after the break...
Also, at least sound ripping wasn't futile. I've got sound clips of the EXE and Zero reveal "movies" in both English and Japanese. Also, those girly grunt sounds.