Okay, you may be confusing the super definition pack for something it’s not. The diamondD super definition pack is for Half Life, not Azure Sheep. Azure Sheep has it’s own Super Definition pack which is why I specifically provided the links for them.
First of all, you should install the Azure Sheep mod to your “steam/steamapps//half-life/” folder, when you finish, you should be able to open up your “half-life” folder and see a folder called “asheep” which contains the azure sheep mod and all necessary files. When you go to install the Superdef Pack, it will ask you for where you want to install it to. For this, you will want to find that “asheep” folder that is located in your “half-life” folder and select that as the location to install to.
If you try using the DiamondD superdef pack on Azure Sheep, you’ll wind up with a lot of models not getting updated, as Azure Sheep includes custom models that were never IN Half Life. If you try using the azure sheep superdef pack on half life itself, you aren’t going to get much out of it. A lot of the stuff that gets changed is the custom models like Kate and the female security guards.
One thing that DOESN’T get changed when you install the Azure Sheep Superdef Pack on Azure Sheep is the main menu background image of Barney, Kate and the chumtoad, which will still look like the NON-Superdef models, but that’s only the background image, the actual in game models should look updated when you actually go to play the game, provided that you don’t have Vista blocking your installation process for some reason.