not sure how much help this really is;
but i found it in two places
by running "NET USE" in a command window, i get results that i could use with xp_cmdshell:
Status Local Remote Network
-------------------------------------------------------------------------------
OK Z: \\web1\Lowell Microsoft Windows Network
\\TFS\Sites\HDS Web Client Network
The command completed successfully.
i was also able to find any mapped share in the registry; but it is mapped to my SID and not a general LOCAL_MACHINE entry or anyting.
HKEY_USERS\S-1-5-21-1645522239-436374069-1708537768-1251\Network
from there, there was a "Z" folder, which internally contained the mapping and a bunch of other stuff
Lowell