Idea for a model, not sure if it's possible

I have an idea for a way a model could work. I was thinking... is there a way to change the attachment points around in animations? IE, you could move his right hand attachment to his right shoulder so he could walk around with his sword on his back when he wasn't fighting, then he would draw his sword and the attachment point would swap to his hand.

I'm not sure how possible this is seeing as I'm a complete noob to modelling, I'm interested in knowing if this is possible though.

yeah that is possible to move the attach point. i personaly never tryed it but there seems to be a (french) tuto about it on metalplanet.org