Net use * \\computername gives a 52 error (duplicate name) with WINXP but not with WIN7

Question

Hi,
I use the command " use * \\computername\share " to test the mapping of shared drives.   
The target machine is a Win7 machine (and is in another subnet).
The lmhost file of the client machines contains the line
" IP address - computername #PRE "
to allow for name resolution.
I  get a correct reply with "ping computername", which shows that name resolution at the level of the clients is all right.
However, when I try the "use * \\computername\share" command, it works fine if the client is a Win7 machine but gives me a "error 52 duplicate name" if the client is an XP machine.
Now, "computername" is NOT the NETBIOS name of the target computer but another name I use for sake of facility (the NETBIOS name of the target machine is a complex one and makes it identification by the end-user difficult when it appears in the
drop list of the GUI command "map network drive" (which is what the end-user will use for mapping).   
Is it possible that the client WinXP tries checking "computername" against the real NETBIOS name of the target machine and says that there is duplication because they do not match, whereas the client Win7 does not do that or accepts that "computername"
is not the real NETBIOS name ?

Answer 1

Dear Carey,
Thank you for your reply.  However, what the link describes is a situation opposite to what I described.
The link is about TWO computers with the same NETBIOS name on a s single local network. Then the conflict is obvious since that NETBIOS name will have to point to two IP addresses.
What I described was trying to map a shared disk on a a SINGLE computer with NETBIOS name "A" and a given unique public IP address (vvv.xxx.yyy.zzz), but to which I referred to in the lmhost file of the calling
computer (located in another local network) with another NETBIOS name ("B") . 
Thus, the target computer is a names "A" in its local network but the lmhost file in the calling computer has a line "vvv.xxx.yyy.zzz 
B #PRE".   This when I got the "Duplicate name error". 
I do not understand the error because the lmhost file should simply allow the calling computer to make name resolution (and say "B" is IP address vvv.xxx.yyy.zzz) to make the connection (which is what we get if we use the command "net use
* \\vvv.xxx.yyy.zzz\share" [this command always work]).  But what I was suspecting is that the calling computer gets confused when it sees that the target computer with address vvv.xxx.yyy.zzz has a NETBIOS name different ("A")
from the one it was supposed to call ("B"). 
Am I correct ?
As I explained in my original post, I uses "B" to name the target computer on the calling computer because "A" is a quite fancy and difficult name that the end user will never understand or remember. 
If I name the target computer "A" in the lmhost file (i.e. its real NETBIOS name), I do not have any problem.