Ok this tutorial is from the no mercy zone on how to dump textures for wwf no mercy. Use this and instead of looking for the no mercy folder find the folder of which game you are dumping textures to.
1. Download the Project 64 1.6 emulator, which can be found at
http://www.pj64.net/files/setup Project64 1.6.exe
2. Download the Rice Plugin and using WinRAR, extract it to the C:\Program Files\Project64 1.6\Plugin folder:
http://www.emutalk.net/attachment.php?attachmentid=23107
3. Download the BMGlib file and extract it to C:\Program Files\Project64 1.6:
http://www.emutalk.net/attachment.php?attachmentid=22952
4. Enter the Plugin folder of your PJ64 folder, and create two new folders entitled: texture_dump and hires_texture
5. Enter the hires_texture folder and create a new sub-folder called WWF No Mercy.
6. Start up PJ64 and go to Options --> Settings --> Video Plugin. Make sure you have the Rice plugin selected as your video plugin!
7. Start your WWF No Mercy rom and find the texture you wish to edit. When you do, go to Options --> Configure Graphics Plugin --> Texture Filters, and check the "Dump textures to files" box.
8. Go back to the game and re-select the texture you wish to edit.
9. Go back to Options --> Configure Graphics Plugin --> Texture Filters, and uncheck the "Dump texures to files" box.
10. Open the texture_dump folder in your PJ64 folder. Inside should be a WWF No Mercy sub-folder. Enter it.
11. Inside should be various texture folders. Enter a folder, right-click and copy the individual texture you want to edit, and paste it into the hires_texture --> WWF No Mercy sub-folder.
12. Using an editing program, edit the texture and save (not "save as"). You may resize the texture to 200% or 400% if you are editing a PNG.
13. Go to "Graphics Configuration", uncheck the "Load Hi-Res Textures if Available" box, hit "Okay", and go back into the game to see your new textures.