ask for the easiest way of porting windows 2000 WDM USB Modem Driver to Windows 98

hoi,
Questions below:
many structures and macros existed in NTDDK are not supported in 98DDK, so I
copied all these from NTDDK and put them in the same header file to make it
compiled successfully under 98DDK. Is this ok? if not, how to solve the
problem correctly?

Best Regards

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