As far as I know, the 1st 26 gpio pins on the b+ are electrically the same as the 1st 26 gpio pins on the b. So, if you can connect an older screen design to those pins, it should work.
However, there may be a physical problem connecting to the new 40 pin connector. I haven't tried this, but based on reading, the shell of a 26 pin connector may physically clash with the 40 pin connector. This applies also to some of the ribbon cables and breakout products. So, check with the vendors and docs to see if you can physically attach the screen to the b+. Also, the layout of components and physical connectors has changed, which you also have to consider. Otherwise, you should be good.
(PS - If you email me and don't get a quick response, you might want to send again after a couple of weeks. I don't always see new email messages quickly.)
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