I know how to fix the 800100514 issue, however, if at all cost's the fixes don't work; would a digital copy of a game from the PSN Store work rather then buying a disc?

I've been having the error for a while now and I'm just getting around to trying to fix it, and I plan on getting a new drive for the PS3. Does anyone know if a downloaded copy would work rather then buying a disc? (Eliminating the problem for the time being).