FYI: Mapping a "drive" within window requires a machine name and a SHARE NAME. e.g.
\\touch\my_documents. One can not map a folder, it has to be a share.
Under Vista, when I connect my phone to my USB port, it is added as a letterless drive under Computer. I can then open it and I see two folders, one for the builtin RAM and one for the Storage Card. No need for any other software.