Well the only way I know is to create another one!
First get
milkshape! You don't need to register for this perpose!!
Open the tool bars in the half-life section choose decompile Hl model/decompile Cs model. Choose a folder that milkshape will place the files in it.(make sure it's not the same folder you placed the original file so it wont be overwritten) After you chose a folder a new window will popup with boxes, make sure they are all ticked! Know in the folder you placed the model's extructed files open the .qc file with notepad. Search for something that should look like this-
$scale- 1.0 Write insted of that number some thing like 0.5
Now through milkshape compile the .qc(tools
> Half-Life -> compile .qc file) and you have an exact replica of the last model only smaller! Rename that model and place it in your model's folder.(Cs's model folder is cstrike/models and Hl1's is valve/models)
And seventh I have Hlmv's latest version(at list they said that in the 67th valtitude) and it can't save models! :