ESF Map Textures

[EvolutionX]

I found nice map textures and i want to change with the default textures in gfx/env/

Now i want to ask i save the textures in 256 p with Photoshop and i dont know with who resolution to save. 32 bits or 24?

I just change some textures, but it show lines. ------> http://img340.imageshack.us/i/esf.png/