Getting Windows XPH to play nice?

Hi all,

I have two computers on the same workgroup.
Computer1 has user1 and computer2 has user2.
I need user1 to access one or more directories
on user2's computer but get an access violation.
User2 can see and modify user1's directories on
the D drive just fine. Both computers have both
accounts on them but user1 is still out of luck. I
did find a program from M$ that is supposed to
be an access list manager from the command
prompt but don't know how to use it. Any ideas?

thanks,
charles.....