oemXX.inf and CAT file

I wrote a USB camera upper filter driver.
Now I got some questions.

  1. After I install camera driver , the InfPath become “oemxx.inf”.

If I use INF to install my upper filter driver, must adjust
oemXX.infcontent dynamically. right?
Does anyone know how to lock the “include = xxx.inf”?

  1. If I use content of adjusting oemxx.inf dynamicallies, but will influence
    the use of CAT file or not.
    Does anyone know how to fix the problem?

Nikki_Lai