VBS Script

Hi All

I seem to be having this problem whereby I am trying to copy a little java applet from a network location. On my local PC, this works fine, however when I place this in the GPO BAT login script, the drives, which have been deleted, are still mapping when it gets to the part of calling the file from the so called mapped drive which hasnt mapped yet. Thus the program does not load. As one cannot use UNC in BAT files, I attempted to use a vbs script, but I cannot find any code to accomplish this. Has anyone got a solution for this?