Jakob , I can't say much sorry. But for the video drivers you would need to mod them to remove some of the code and/or dependencies , also the bloody artificial block that Intel/Nvidia put there .
And that's only the top of the iceberg ! Even to test how they work , you would need to sign them! No procedure to load the unsigned drivers .
This trick will not work on modified x64 drivers/systems, I tried. It's good and working only if you mod the "ini" file to add devices.
bcdedit.exe /set loadoptions DDISABLE_INTEGRITY_CHECKS
bcdedit.exe /set TESTSIGNING ON
So I suggest to start modding 32-bit drivers and try, if there are any.
As an example , I tried to mod an Nvidia driver that needed only two values to be changed , I succeeded with 32-bit version , because the 64 one wouldn't load (unsigned .sys driver).
Where to start ? Extract the driver and look for the missing stuff with Dependency walker.
Hope this helps.
Dixel.