Here are 3 things I learned the hard way....
1. If file you run unpacks in your same directory you run it, create a folder and run it within that folder. That way if you have another .nbh file it won't get flashed instead of the one you really want flashed.
2. Run as Administrator or it might not even run at all.
3. Hard Reset phone after you do all Radio, HSPL or ROM programming (just to make sure your memory gets wiped out and doesn't act funny.