Are you trying to gain Visual Studio Intellisense for editing these XML files in the Visual Studio IDE?
If so, place the schema in the same Visual Studio project that contains the XML files you want to edit, or place your schema centrally in the Program Files\Microsoft Visual Studio _.0\Xml\Schemas
folder.
Be sure to define the targetNamespace within the schema and use an xmlns
declaration to reference this target namespace from your XML document.
<Element xmlns="http://your/schema/target/namespace/here">
<Element />
<Element />
</Element>