Hiya
OK, I tried using image capture but I couldn't scan text with it so what I did is go to the HP site and downloaded the new driver. The site is a bit pants but if you select any C4400 series printer, i think (dont quote me) that its the same driver anyway. There is 1 driver for tiger lepoards etc and a new one for 10.6.
Anyway I uninstalled my old software and installed the latest software, selected printer etc. Worked a treat. While I didn't want the hassle of this, I scanned the pdf in and tried highlighting the text. Preview works bloody brilliantly. This is going to make life very much easier, Preview picks text up just as it says on the tin. For a dsylexic like me, this is priceless!!!