I have an A1237 sitting here and the hard drive is non functional (I get a ? on a folder flashing on boot up, took it to the Apple store and they also determined it was the HDD). Anyway, replacing the HDD seems a little expensive...I can't find any affordable 1.8HDD's with the ZIF connector. Is it possible to boot from a USB stick? What are my options with regards to finding a replacement HDD? Thanks in advance.