Although it is not impossible... mr_smartepants is 100% correct (again),
the Finisher does NOT run at t-13, nor any other DriverPacks function, and they absoutely should not be modified / customized to do so.
svcpack.inf executes at the T-13 minute stage do you have a call to the finisher in SvcPack.inf by mistake?
No part of DriverPacks is set to run from service pack INF, PERIOD. (At least not by DriverPacks BASE. Nor is it recomended by any instructions found on this site)
The extraction of the DriverPacks is done WELL before this stage of setup and the finisher is not ever SUPPOSED to run till after the reboot. It is POSSIBLE that there is a mistake (made by you or others) in your setup... IE there is a call to the DriverPacks Finisher buried in your svcpack.inf or one of the functions, routines or scripts that is called from svcpack.inf. (if you put in a blank svcpack.inf does the issue go away?)
I am going to make a bet here... I bet a dollar that there is a direct or indirect call to "install" or "install.cmd" in your SvcPack.INF.
-If you change the name of your script to Customiz.cmd does your issue go away?
Never EVER do KTD "ALL" ...
It won't work and it will probably cause NONE of the DriverPacks to work as KTD is intended to... KTD means you intend for the DriverPacks to be available post install (read "available FOREVER"). The path length long ago exceeded the max size of a single registry entry ( I have forgotten but i belive it's one MB in XP ). Best case scenario it will truncate the path and you will get a partial path, most of the time it will simply be left as a blank path (not even the default of %systemroot%\inf will exist... Extremely Bad!). Worst case scenario this will render ALL drivers unavailable (meaning even the included with windows drivers), or best case scenario most of the drivers unavailable (about three gig of driver files on the HDD that are invisible to windows). if you insist on KTD (not recomended ... Use SAD instead) Then ONLY KTD the monitor pack, modem pack and HID pack or other Third Party DriverPacks (things that a user might plugin post install {ps the Printer Pack WON'T work since it requires the DriverPacks Finisher}). Chipset, Mass and Graphics are not going to change
... and if they do change your not going to want drivers that are outdated nor have the mess in the registry. I am going to assume that your not going to update the MB and Graphics card the first week ... and if you do it's probably a good idea just to do a clean reload ... especialy since you have an unattended install
.
KTD never did, and never will, do what it was intended to do. Any driver that requires "finishing" IE reg files added or setup run or any additional tweaking (stuff normally done by the DriverPacks Finisher) WILL fail to install. IE graphics cards, printers, sound cards... will all fail to install properly... so don't include them with KTD. In fact if you are smart you won't use KTD at all.
If you do install a printer or sound card or video card then run SAD! It works 1000% better and does not burn a bunch of HDD space needlessly.
KTD was replaced and made completely obsolete by SAD.
Having said all that, I must also admit that KTD with the Monitor, HID and modem packs might make sense in special cases... like for a PC repair shop where the end user's monitor, modem, keyboard or mouse are not at the shop with the PC. Please note that these are very simple drivers and very small packs.