1. install Condor Updater, install it....

(
http://tinyurl.com/bm4cecj )
2. grab a thumb-drive and make an UPDATE folder in the root, add PS3UPDAT.PUP to that "UPDATE" folder, plug drive to PS3.
3. run Condor Updater from xmb, it'll take you into a pseudo-recovery mode, install the firmware.
4. PROFIT!