You can use instead, Texture Resource? It's an online downloading and editing textures, you can see the list "R" or "PS2" to findm The link will be posted after the reply.
He was asking for a texture editing software, and Texture Resource doesn't have any Rayman 2 textures.
I don't know of such a software, but if you need the textures, you can use a ripping program, such as 3D Ripper DX, that rips both models and textures. Sorry I couldn't be for any more help. I bet some other people on here know of something...