Mac question

[starkey <starkey@entropy.phy.ilstu.edu>]

HI!, Ihope I'm posting to the correct group.
 
1) how can one disable an apple server from copying over a file when two
files have the same name. i.e. Someone tries to save a file or a folder
and it has the same name as a cuurent file. Instead of offering the 
option to copy over the existing file, I want the server to make the 
user rename the file before it will save it to the server's hard drive.
Any ideas would be appreciated.
feel free to respond directly,
starkey@entropy.phy.ilstu.edu