How do I upload any screenshots?

People, how to trick Steam and upload any screenshots?

Here I have sketched a couple for one game. Replaced them with corrected ones. I gave them the same names as the screened files. And even deleted the remotecache.vdf and screenshots.vdf files.
I launch Steam - and still he sees only those screens that were actually screened, but not those that were changed.

Where else can a steam store information about screenshots so as not to accept modified ones?