A utility that allows you to view .mdl files that are unsupported by the original HL2 beta engine due to their older MDL version. You can view v31 - v36 models using this tool.

Installation:
Unpack the 'hlmv v31-v36' folder in this archive into your Half-Life 2 beta folder (i.e. anon-hl2) and run hlmv.exe.