Command line syntax: 

RemoteScanEnterpriseASP.exe /s server "install path" [update_citrix_client] [start_server] [hide_program_group] [as_service]

Where the arguments are defined as follows: 

RemoteScanEnterpriseASP.exe - The name of the installer, keep in mind that this may be slightly different depending on the version of RemoteScan™ that you have purchased. 

/s - A flag that tells the installer to run in "silent" mode with no user interface 

server - Indicates which RemoteScan component to install. The "server" is the component to install on the local workstation. 

"install path" - This is the path to install RemoteScan to. Typically "c:\Program Files\RemoteScan Server". 

update_citrix_client - A 'Y' or 'N' flag indicating whether to update the Citrix® ICA client. Only put a Y here if you are using RemoteScan™ with Citrix®. 

start_server - A 'Y' or 'N' flag indicating if you would like the RemoteScan Server component to run after installation is complete. Normally you will want to put a Y here. 

hide_program_group - A 'Y' or 'N' flag indicating whether to hide the RemoteScan program group. Normally set to 'N'. 

as_service - A 'Y' or 'N' flag indicating whether to install and run the RemoteScan Server as a service. For Terminal Services and Citrix® we strongly discourage running RemoteScan as a service and suggest using a 'N' here. 

source: http://www.remote-scan.com/silent_install.php