Yes, but it is good to get your SuperCID. You can follow this guide to do so:
http://xdaforums.com/showthread.php?t=2365506
"getvar:all FAILED (status read failed (Too many links))"
Im not sure about this statement here. You might face some troubles while flashing the firmware.
That error can be ignored, I remembered it showed up on mine with the factory firmware, before I flashed the 1st firmware.
Not sure if it makes a difference, but if I were you, since you have such an old firmware, I would flash the full firmware (RUU) for your phone (if you have AT&T, flash AT&T stock, TMO with TMO stock RUU, etc...), then do the rest.