If it's just installing the MSI, silent installation use msiexec.exe i\ file.msi /quiet /norestart
For installations while viewing message box with no prompts try msiexec.exe i\ file.msi /passive /norestart
logfiles can also be generated, for a full explanation of switches type msiexec /? in the Start/Run box and it will display the avialable parameters.
Cheers,
J