First if you dont know how to drop your console

go to www.geocities.com/leaderclan

If you go into your files C:\Sierra\Half-Life\valve

look for config its a text file.

Now play a game and drop your console type

bind x "model delco"      (Just like that and hit enter raise console)

Get out of game go back to config text see

the command you just linked to x key

here add the ~ 

then save changes and play,now you can get the model

to work they way its suppose too.:)