HyperNURBS pretty much just smooths your rander and looks good in some cases, you can use it by Objects -> NURBS -> HyperNURBS then in the upper right you should see somthing it and your render, then just drag your render under the hypernurbs and you should see the effects of it. ANd when you said you attempted on of tweaks tuts, im thinking your talking about the first sig you have, looks ok but i guess its good for following the tut and your a noob, but its good to try to experement rather then just following a tutorial EXACTLY.
Edit : Tweak posted before me (wtf you dont have schhol? or are you at school?), my post was aimd tword fatknacker lol
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[23:18] J: OH MY GOD DUDE
[23:18] J: you're a fucking tool
[23:18] J: open the fucking drawer
[23:18] J: and right there
[23:18] J: next to the goddamn hammer
[23:18] J: is you
[23:18] J: you fucking tool