It's pretty easy- just find the file that says CE 2.00 SH3 .cab
(that means it's the exact CPU type / OS you use
) and copy that file to a CF card, and insert into your device to install directly
here's an article that explains some more:
https://www.hpcfactor.com/support/cesd/200052/installing_applications_onto_windows_ce_using_a_cab_file/