XeNTaX

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struct header {
	DWORD unk1; //From the files I checked, it was always 0x20031117
	DWORD unk2; //From the files I checked, it was always 0x0
	DWORD unk3; //From the files I checked, it was always 0x0
	DWORD unk4; //From the files I checked, it was always 0x0
}

struct offsets[4] { //This section contains 4 sets of offsets (offset + size)
	DWORD offset;
	DWORD size;
}

//original source file, max of 64 bytes, path is padded by extra 0's to fill the space
char srcFile[64];

//offset 1 - files I looked at always had a size of 4 for the first offset
DWORD unknown1; 

//offset 2 - some kind of extra information for the mesh (will post later since I don't know the full structure)
//offset 2 section
//bone info perhaps?
DWORD count;
struct bone_info[count] {
	DWORD nameLen;
	char name[nameLen];
	DWORD index; //always seemed to be 1
	DWORD boneCount;
	struct Bone[boneCount] { //28 bytes, floatx7? floatx3+intx4?
		//from sampled data, the first 12 bytes were of float data, possibly a position?
		float pos[3];
		float rotation[4]; //quarterion? was always 0 in sample files
	}
	DWORD unknown; //always seemed to be 0
}

//offset 3 - was same as offset 1
DWORD unknown3;

//offset 4 - vertext/index data (and possibly more)
//offset 4 section
DWORD index; //or mesh count? could match up to bone_info[].index?
//rotation/translation or translation/rotation? or something else, 24 bytes (6 floats)
//EDIT: could also be a scale, my guess its rotation and scale
float rotation[3];
float translation[3];
DWORD unknown1[4]; //usally 1,0,1,0 or 1,1,1,0
DWORD count;

//index data
DWORD indexCount; 
WORD indices[indexCount];

//vertex data
DWORD vertexCount; //NOTE: same as count! so either could be the vertex count?
struct vertex[vertexCount] {
	float pos[3];		//position
	float normal[3];	//normal
	float uv[2][2]; 	//2 sets of UV coords
	float unknown[4];	//usually 0,0,0,0 or 0,0,1,0
				//could be a quarterion
}
DWORD nameCount; //usually 0
struct name[nameCount] {
	DWORD nameLen;
	char name[nameLen];
}
DWORD unknown2; //always 0?