Xbox 360 UI Mod v2.5 for Half-Life: Source.
How to install the mod:
1 - Install Fonts from the first folder ("1 - INSTALL THIS") into your Windows.
Double-click on them and select "Install" button.
2 - Install base of the mod from the second folder ("2 - BASE") into your game's root folder.
...\steamapps\common\Half-Life 2\
3 - Install the rest of the mod specifically for your desired resolution ("3 - RESOLUTIONS") into your game's root folder.
This step is almost the same as the previous one.
4 - Put the following into your game's launch options in Steam:
If 480p:
-w 640 -h 480 -fullscreen
If 720p:
-w 1280 -h 720 -fullscreen
If 1080p:
-w 1920 -h 1080 -fullscreen
How to uninstall the mod:
1 - Delete the "custom" folder from "...\steamapps\common\Half-Life 2\hl1".
2 - Verify the game files in Steam.
3 - Reset the keyboard settings in the game's options to defaults.