Here is a list of command-line switches that wceload.exe supports:
/delete - if value = 0 do not delete cab after install
/noui - perform a silent operation. Do not ask if it is ok to overwrite the exiting files
/nouninstall - do not create a .uninstall file. The applciation entry will not appear in Remove Programs list
/askdest - will force wceload to display a dialog that allows user to select installaltion location and some other things
/noaskdest - install specified applications to specified locations (see below)