eWallet 4.1 and higher supports silent installs. The command-line options are /SILENT and /VERYSILENT. /SILENT will run the installation with a displayed progress window, and /VERYSILENT will run the installation without any graphical feedback.
Note that eWallet may launch at the end of the install, along with the Getting Started help document. Currently, there is no way to prevent this.
Here is some additional information from the documentation for our installation software:
Instructs Setup to suppress message boxes. Only has an effect when combined with '/SILENT' and '/VERYSILENT'.
The default response in situations where there's a choice is:
-Yes in a 'Keep newer file?' situation.
-No in a 'File exists, confirm overwrite.' situation.
-Abort in Abort/Retry situations.
-Cancel in Retry/Cancel situations.
-Yes (=continue) in a DiskSpaceWarning/DirExists/DirDoesntExist/NoUninstallWarning/
-Yes (=restart) in a FinishedRestartMessage/UninstalledAndNeedsRestart situation.
5 message boxes are not suppressible:
-The About Setup message box.
-The Exit Setup? message box.
-The FileNotInDir2 message box displayed when Setup requires a new disk to be inserted and the disk was not found.
-Any (error) message box displayed before Setup (or Uninstall) could read the command line parameters.
-Any message box displayed by [Code] support function MsgBox.