Clients re-connecting to new server

I experienced a problem with my GSS server, so it being relatively new, I just clean-reinstalled WS2008 and reinstalled GSS 2.5 from scratch. I have a startup script in a GPO that installs the Ghost client on my PCs in this manner:

msiexec /i "\\server-name\ClientInstall\Client.msi" /q GHOSTINSTALLTYPE=Client GHOSTCONSOLESERVERNAME=123.123.123.123

For a computer newly joined to the domain, this works great. For a computer that I had already joined to the domain that already has the Ghost client installed, this doesn't work and it can't connect to the server.

Is there a way I can get the startup script to install the Ghost client and actually find the re-built server?

Thanks!