Those are
my textures, several of them, to be precise. And the level looks very much like mine too. Check out my level 'ORJ Secret Temple - Preview' - it's hosted here on Massassi:
http://www.massassi.net/levels/files/2943.shtml
Xzero, it's cool my level 'inspired' you. But don't you think the level looks a little too much like mine? I don't want to say 'rip off'.... but....geez it IS a rip-off of my level, face it.
If this is what you're gonna do with them, you don't have my permission to use the textures, sorry. Try to be more original... besides you should have asked about those textures in the first place!
Don't imitate people's levels man, please! And especially not when you're going to use the same textures too!!! (I'm not saying you should only change the textures, I'm saying you should scratch that level - anyone can see it's a rip-off.)
Other than that, cool work on the mod. It's an adaptation of SBX isn't it?