void makeMdlBuffer()
{
	var vSize;
	byte* buffer;
	
	/* the minimum MDL5 has no vertices and one single frame.
	   It requires 120 Byte of Memory
	   header: 84 bytes
	   frame:  36 bytes
	           byte pack info: 4 bytes
	           bounding box:   16 bytes (word packed)
	           frame name:     16 bytes

	   This is a hack to overcome the incompatibility between
	   NULL-Entities and ent_setmesh().
	   MDL5 format info taken from Acknex manual
	*/   
	vSize = 120;
	buffer = (byte*)malloc(sizeof(byte) * vSize);

	/* since there is no skin, no uv map, no lod, most bytes can remain zero */
	memset(buffer, 0x0, vSize);
	
	/* set file type info */
	buffer[0] = 'M';   
	buffer[1] = 'D';   
	buffer[2] = 'L';   
	buffer[3] = '5';
	
	/* set number of frames at bytes 69-72 */  
	buffer[68] = 1;
	
	/* MDL5 seems to support word packed vertex data only. 
	   Enable word packing at bytes 85-88 */
	buffer[84] = 2;

	/* that's it. Amazingly simple */
	add_buffer("simple.mdl", buffer, vSize);
}

...
	entDummy = ent_create("simple.mdl", vecPos, NULL);
...