X files and Make MDL.Help!!!

This is from the make mdl sdk.
Name of the input file (.x file). The file name has the following form: Base_Name[_TYPE][_LOD][_A-Z].x
Where:
[_TYPE] is the model type. Use
Name of the input file (.x file). The file name has the following form: Base_Name[_TYPE][_LOD][_A-Z].x
Where:
[_TYPE] is the model type. Use