Read the rules link in the OP, you don't retrain feats/skill points.
-Xavez
but you can if you spend some gold and XP and time. I don't remember where it's from, but you are allowed to retrain feats if you put the resources into it.
*note: not all advice by this poster is meant to be taken seriously.
Warlock/Swordsage avatar by yldenfrei
optimization is like salt. a pinch here and there can't hurt, but too much will spoil everything.