I have faced this twice, so it needs a post :) it is really a minor clarification, but here it is.
You will find, after creating a SharePoint 2010 project, that Replaceable Parameters are used in Visual Studio projects. For example when you deploy a feature the $SharePoint.Project.FileNameWithoutExtension$_$SharePoint.Feature.FileNameWithoutExtension$ token appears as the name of the folder.
Then you realized that it is not your best name, and you want to change it. You search for it but with no luck. You try in the feature properties but it is not there!!
And then you double click on it, and that's it, in all its glory the features properties appear aka DeploymentPath
This was easy ;)