Win2K3 SBS Login Scripts

I inherited a Win2K3 SBS server when I started with my current Company. I now need to modify the existing Login Script, but am a littel puzzeled with what the original people did here. The Login Script is named. SBS_LOGIN_SCRIPT.bat and has this line as the script: “\\FTSI04\Clients\Setup\Setup.exe /s FTSI04” I cannot tell what, if anything the Setup.exe file is running. The file is actually located in the C:\Program Files\Microsoft Windows Small Business Server\ClientSetup folder. There are some .inf, .prf, .dat and .mst files. Can anyone tell me what this script is doing?