That's one of several SBF files. As long as it's for the Droid 1, any SBF file will work, but a full, stock SBF is what we need to work with now. That will put you back to out-of-the-box stock running FRG22D. You then will need to re-root, flash recovery, then lock in your custom recovery image with Motocache1's update.zip, and go from there.
Ok Justed finished using RSD Lite