Is it possible to install HFW without external storage?

I'm on an unmodified super-slim PS3. It has been updated to 4.89. Is there any way to install HFW 4.89.1 without storage media? If not, is there perhaps some way to factory reset my PS3 then only update to 4.82 (apologies if this isn't the version with the webkit exploit, I'm new here) and go from there? If not, that's okay, I'm just curious.
Thanks in advance.