My First Ever Portal Map!!!! addon

Directions to install are below:

Place the bsp file inside maps folder which is inside the C:\Program Files (x86)\Steam\steamapps\common\Portal\portal folder.

By the way: Program Files (x86) is, on 32 bits computers, just Program Files, so if your Windows Install is 32 bits, then remove the (x86) from the folder name of Program Files (x86).

To find if your computer is 32 bits or 64 bits, click the start button, right click the Computer button and click "Properties" without the quotes. Then scroll down to System and it will say directly "64-bit operating system" or "32-bit operating system", without the quotes. This will determine which Program Files folder you open to get to your Steam games directory.