rooting/downgrading d85110r without computer? topic

So I had to have a replacement phone insurance-mailed to me yesterday, and of course it came with 10r. YAY.
I had preciously rooted/recovered/romed my phone before all no computer, but now im miserable. Dude this skin is fug. Is there a way to do this is an easy to understand beginner way or do I have to wait? Nobody I know really has a laptop I can use to even try to do the current method, and I'd be to nervous to try to anyway. Downgrading to 10m wouldn't need a computer would it?