Saving one file over multiple file names?

[Vagrant0]

Basically wondering if anyone was familiar with a utility that would allow you to mass replace dozens of texture files with a single file... For instance, have the information in one file saved over multiple other files with no standardized naming method. The reason I ask is so that I can finally ge around to replacing all the default face testures in Oblivion with a blank one. Normally I would have to open up the .dds file and resave it over each and every of the 3800+ files. Trying to see if there's a slightly quicker way. However, as I can't seem to think of any situation like this coming up normally, don't know how useful anything would be.