There is no way to get to the new GB without going back to FroYo via SBF.
The hundred people who have tried to do it and posted here saying, "I'm bricked because I tried using maderstock, how do I fix it?" or "I'm bootlooping because I restored an old nandroid, how do I fix it?" or "I tried installing the GB leak over the old GB and now I'm bricked, what do I do?" will attest to this fact.
In order to get to the new Gingerbread, you must go back to FroYo via SBF. Period. There's a reason those were the instructions, and it ain't because TBH likes making things difficult. If there were an easy way to upgrade without SBF, those instructions would have been posted.