I bought my Powerbook in March 2005. I bought the combo drive version and not the Superdrive. While I love it to bits I really need a bigger HD as the current 60GB is just not cutting it for me and I would like to replace it with a 100GB. I would like to do this myself as I used to do it during my PC days all the time. Has anyone out there replaced their Powerbook's HD? Does anyone know if only certain HD's work with the Powerbook? Any info you guys have would be great.