Does PersistAllDeviceInstalls and/or DoNotCleanUpNonPresentDevices remove drivers from the driver store?

Question

Let's say that I have three completely different computer models, and I want to add the drivers for them all to a single image using pnputil.exe.
1. My understanding is that PersistAllDeviceInstalls and
DoNotCleanUpNonPresentDevices remove the actual install of the devices but not the
drivers themselves.  So, the drivers themselves should continue being installed in the driver store.  Is this understanding correct?
2. If this is correct, then what exactly are PersistAllDeviceInstalls
and DoNotCleanUpNonPresentDevices changing?  What are they removing?
3. If my understanding is correct, then if PersistAllDeviceInstalls
is set to false and DoNotCleanUpNonPresentDevices is set to false, then devices that have drivers previously added using pnputil.exe should automatically re-install themselves after Sysprep, right?
Thanks for any clarification.

Answer 1

Yes,sysprep deletes any custom drivers from the store,because any added driver is seen as a specialization.
To preserve your added drivers you need to use PersistAllDeviceInstalls
 along with the DoNotCleanUpNonPresentDevices
set to true switch.
BUT
it is not raccomended to apply a sysprepped image with PersistAllDeviceInstalls
to machines that doesn't have identical hardware configuration because the results are impredictable (as happened in the casistic you described).It depends on what kind of drivers  you want to preserve though.
In your case i'll suggest to integrate the drivers you need offline with dism in order to bypass the sysprep behaviour,assuming that the utility you are using generates wim image type
To answer your question,yes,sysprep without the DoNotCleanUpNonPresentDevices
set to true will delete the custom drivers you added because those drivers aren't in use when sysprep runs.
If you want to gain a deeper understanding on sysprep here is the link of "how sysprep works":
http://technet.microsoft.com/en-us/library/cc766514(v=ws.10).aspx