Vista - How can I get Isolated Storage?

Is it possible to get IsolatedStorage through PowerShell?

I was just trying to get to the user store for assembly;

[^_^]PS[33]+>$us =
[System.IO.IsolatedStorage.IsolatedStorageFile]::GetUserStoreForAssembly()
Exception calling "GetUserStoreForAssembly" with "0" argument(s):
"Unable to determine granted permission for assembly.
"
At line:1 char:79
+ $us =
[System.IO.IsolatedStorage.IsolatedStorageFile]::GetUserStoreForAssembly(
<<<< )


I haven't a clue how to use "IsolatedStorageFilePermission" in
PowerShell(interactive mode, not through cmdlets) to get an access to
the isolated storage.

If anyone has workaround or tips on getting isolated storage files, I
would appreciate it.
(By the way, I am just getting to know about Isolated Storage, and have
only tried to accessing it through C#).