No problem, sorry I didn't have better news for you
hi. just got a Droid X for free, did a factory wipe. then i got all the latest updates.
SYstem Version: 4.5.621.MB810
i went through the steps listed on the OP - not going to copy/paste the whole thing.
anywho. it did not work - i will post exactly where it failed later this evening.
this is such an old thread i doubt if it is updated . AFAIK 621 has never been rooted you have to roll back to .604 then take a rooted zip to update to 621 ..
found a simple guide
[Guide] Stock unrooted 621 (or bricked) to Full rooted 621 (With proper kernel) - Droid X - RootzWiki
"The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?"