Valve XSI Add-on

So I got the add-on, because I assumed I need it. If I don't, tell me so I can avoid all this.

Anyhoo, the website said go File > Add-on > Install, but I don't have said path. Add-on is not anywhere on my copy. So... double you tee eff?

The file you need will have a name similar to "ValveSource.0105.01.xsiaddon" and is located in this root folder: "C:\Program Files\Steam\SteamApps\youremailaddress\sourcesdk\xsi"

To be clear, the entire "Add-on" installation process is about 1/3rd of the way down this tutorial page:

http://www.snarkpit.net/editing.php?page=tutorials&game=HL2&id=200

Use the tut to doublecheck you're doing everything you need to.

If you're still confused, just read the whole tutorial. It'll walk you through.

Jesus Christ, I just completely missed the Add-On section under the 'File' drop down.

Momentary stupidity right there...