I need to run sfc.exe remotely. I've copied the I386 folder from XP SP2 to a network drive, and changed the registry to point to it. sfc.exe runs about halfway through, and then comes up with the prompt to mount the actual CD for SP3. The registry service pack files entry points correctly to the standard service packs folder on the C: drive, and there's a SP3.cab file there.
In research I've done, I found one article that said the servicepack registry entry had to also be pointed to the CD i386 folder. But if I do that, won't it replace the corrupted file(s) with SP2 files and cause a problem? The popup specifically asks for SP3 CD, not SP2.