Ok listen up!
Heady has very limited time these days so i can't know when he will create the update patch with his installer script. But! in order you don't wait till then, i made a very simpler update patch so you can play. When he makes it, i will delete mine and upload his update patch instead since it's better. You will not have to reinstall it though.
Installation Instructions
Assuming you have installed the update patch v8, go to the first post of this topic and download the v9 one.
Run it as administrator and choose your CS:S folder (where the hl2.exe file is located) as destination folder.
If the program asks you if you want to overwrite the files, select yes to all.
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I'm waiting for your feedback about if the update patch worked for you.