I have no idea what, if any difference it might make, but in the case of the
PPST.exe file, the one deployed with the PPCKitchen sprint carrier files dated (07/31/2008 01:07:48 AM) is not the same version as is delivered with the latest Sprint ROM for the Touch/Vogue ... and it appears that the version from the Sprint ROM is somewhat more recent / higher in version than the one being deployed with the PPCKitchen Sprint carrier selection.
Code:
PPCKitchen: BuildOS\Kitchens\Carriers_Vogue\Carriers_Sprint
PPCKitchen: PPST.exe
PPST Date: 07/12/2008
PPST Date: 4.20.0.0
RUU Version: 3.03.651.4_2
NBH Information: 2.nbh 104,642 07/17/2008
PPST CAB Info: PPST_080516_7500_SPCS_2.04.sa.CAB
PPST EXE Info: PPST.exe (0000PPST.005)
PPST Date: 07/17/2008
PPST Version: 4.20.0.99
But I think that an important point to stress is that running PPST _once_ when the Sprint ROM was installed (customizations) is all that should be necessary.
FWIW
Best regards,
-boggsie