Hey i posted a tab without beeing registered. is there anyway to get credit for that tab, or make it show as mine?
I don't think so, I'm pretty sure that was your one shot at it. You could of course try and get a mod to change it but they aren't going to for several reasons, one; you'd have to be able to prove it was really you that did the tab, and two; they have much better things to do than try and earn you UG points.
That, do it!