https://bitcointalk.org/index.php?topic=83371.0This is a good guide, just do everything the same way with bitbar as you would LTC.
Personally, I wouldn't advise mining bitbar. When chinacoin was announced, there was a p2pool set up and posted on the first page of the announcement thread. While you can debate weather or not FTC and CNC are actually worth anything, they are near exact clones of LTC. With bitbar, there's an entirely different kind of risk involved. Bitbars difficulty and payout per block just don't make it appear sensible right now, if you can even find a block. After sixteen pages of comments in the announcement thread, as far as I know, no one has set up a pool yet. I think that speaks for itself.