A script-suitable command line for a completely quiet install of SQL2008:

\\path\to\setup.exe /action=install /features=ADV_SSMS /PID=<Prod ID (license key)> /q /hideconsole

A similar line to uninstall the tools:

\\path\to\setup.exe /action=uninstall /features=ADV_SSMS /q /hideconsole

A complete list of SQL2008 installation switches:

http://msdn.microsoft.com/en-us/library/ms144259.aspx