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YourUserName
From HalfLife 2 Knowledge Base
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Summary
You have most likely been directed here because you have been given a path to your steam user's folder.
YourUserName corresponds to the username you use to login to Steam
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Advanced
This folder is normally in your "Program Files" folder and then under the subdirectory path:
Valve\Steam\SteamApps\
If you only have only ever used one username on your current computer a quick way to get to your username's path in DOS is to type the following:
cd\program files\Valve\Steam\SteamApps\*
Unfortunately * does not work in config files etc, so you will normally be forced to change all settings relating to your username's folder manually.

