Aha! I wasn't aware of the log being there. The following errors occur every time someone runs the script:

2003/01/07 08:44:25 - Failed to load KX95.DLL Error : One of the library files needed to run this application cannot be found. (0x485/1157)
2003/01/07 08:44:25 - Failed to locate/connect to a KXRPC server Error : The network path was not found. (0x35/53)

I previously wasn't copying over that file to the correct location and only changed it to do so this morning when I started looking into the problem (which is why it says in my previous post it copies over kix95.dll - it didn't have it in the right place when the errors were occuring).

I was aware Windows 98 maps the Z: to netlogon but NT-based OSs don't - if I didn't map it to another drive and run it from there the script wouldn't work on the NT-based machines.

I'll let you guys know tomorrow after users login in the morning...