Is there a way to pass this folder in to ClientSetup.exe to do an unattended install?

My client has a 256 user system and it could get quite tedious to run this on each station having to type this in

 running clientsetup.exe /?
shows the following options:
/S (assume this is silent mode)
/F=<startmenu folder>
/E=<status file>
/G=<startmenu flag>
/O=<oisourcedir>
/D=<localdir>

So I would say the /D option is the correct one.