You can use VBA to set the sheet as VeryHidden, which can only be unhidden through VBA.
The following code will test for your user name and if it's not you, hide the sheet when the wb is opened:
<font face=tahoma><SPAN style="color:#00007F">Private</SPAN> <SPAN style="color:#00007F">Sub</SPAN> Workbook_Open()
<SPAN style="color:#00007F">Dim</SPAN> AdminUser <SPAN style="color:#00007F">As</SPAN> <SPAN style="color:#00007F">String</SPAN>
AdminUser = Environ("username")
<SPAN style="color:#00007F">If</SPAN> AdminUser <> "yourusername" <SPAN style="color:#00007F">Then</SPAN>
Sheets("Users").Visible = xlVeryHidden
Else: Sheets("Users").Visible = <SPAN style="color:#00007F">True</SPAN>
<SPAN style="color:#00007F">End</SPAN> <SPAN style="color:#00007F">If</SPAN>
<SPAN style="color:#00007F">End</SPAN> <SPAN style="color:#00007F">Sub</SPAN></FONT>
Hope that helps,
Smitty