How modify MSPLOT to avoid calling DrvBitBlt?

I'm modifing the MSPLOT from the last WDK, and I want to avoid calls to DrvBitBlt.
I tried to delete Hook fuction from table and define, but I receive an error during the printing.
Some programs print using DrvBitBlt, other programs print calling DrvStrokePath: I want that all program call DrvStrokePath.

I need to do a driver HPGL and avoid any BitBlt or other raster function, I can only plot by vector function ( Strokepath etc... ).
What I need to do? Do I need to modify MSPLOT or modify UNIDRV vector by creating a Kernel driver DLL?

Thanks