This is what i did:
ive synced my phone with Facebook,
then went to contacts\ menu \ more \ display settings, and set it to show facebook friends,
then i went into a contact i wanted, and merged it with his facebook entry, or the facebook entry merged with the contact, im not sure, just go to one of them, and go to menu \ merge, and choose who to merge it with, and then when i was done with all the contacts i wanted, i set it back to not show facebook friends.
there might be a better way, but i don't know one..