Marlon,
I believe this is possible by moving the registry entries for the driver to the BuiltIn key, e.g.
[HKEY_LOCAL_MACHINE\Drivers\BuiltIn\MYUSB]
"Dll"="myusb.dll"
...followed by other keys related to myusb.dll like Prefix, Order etc.
I'm about to start my weekend so don't have time to test, but I think this is how we did it on a CE 5.0 platform I worked on a few years ago. If you can't get it to work I'd be happy to double check on Monday.
Best regards,
Carsten