WCELOAD.exe is the application required to install CAB files for Windows CE. It is located in the \Windows directory.
/noui - Specifies no user interface while the install is taking place.
/noaskdesk - Do not ask the user where to install the application (Storage card, RAM).
/nouninstall - Specifies that the application cannot be removed. No .unload file will be created if this flag is set.
An example of the command could be:
\windows\wceload /noui /noaskdesk \Storage card\myapp.cab.
Note: If the /nouninstall flag is not set, an .unload file is created in the \Windows directory which has this naming convention:
This is a useful link that contains more information on the subject: