Maybe I don't understand what your trying to say. My Win7 x64 Ultimate user space is under C:\Users\Name.
If you link your computer to other computers it can be used as Public, Private, Work workgroup. Once you connect to the pc you are going to share, and have adapted it's workgroup name, then you can share any directory you want to creat directories for the users connecting. You may have to create indivual accounts on the Windows 7 machine.
Is that helpful?