I have modded one but failed.

Any idea?
I used ATI 7.73 (4.3.4017) as a base. There are individual folders of \9X, \NT4, \W2K, \XP and \XP64 in it. When I ran setup.exe, it told me that I need DirectX 8 or above. DX8 doesn't support to be installed on NT4. So I directly modded atiintag.inf (attached below) in \BN_03929 under \NT4 folders, and selected it within [Control Panel | Display | Settings | Display Type... | Change...]. Is it true that these *.dll / *.sys / ... must co-work with DirectX 8? Is my modded atiintag.inf with bugs?
