The files in Step 5 are no longer needed. Steps 1-4 are still useful for setting up ADB, then jump to Post 3 and install Heimdall. Use Heimdall to install "CWM4 fixed for CM7" & GB bootloaders & then flash a custom ROM. To keep up-to-date on any recent changes to requirements for the Fascinate (and download needed files), I recommend checking DroidStyle's Guide at XDA, although the instructions there are for Windows and will need modified for Heimdall.
Samsung Fascinate (Galaxy S1) running CM11 Kit Kat w/live overclocking and full transparency