Yes,
in the preceeding sample code,
"test", is the name of the assembly (you will find a freshly generated dll named test.dll in your %TEMP% folder)
"DB" is the root namespace of the classes in your generated assembly, thus "DB.MainDataContext" is the DataContext class to create with new-object.
You can of course change them to any value meaningful for you. Please ensure that the third parameter in New-DataModelAssembly points to an existing folder where the code has write permissions (e.g.: your temp folder).
Cheers,
Alessandro
