crwdns2934241:0crwdne2934241:0 mayer

crwdns2934249:0crwdne2934249:0:

Sure, it can be upgraded.  The problem is finding one.  Here's three of iFixits:  http://www.ifixit.com/Mac-Parts/PowerBook-G4-Titanium-Mercury#0-Optical+Drives

Here's how to install it:  [guide|64]

crwdns2915684:0crwdne2915684:0:

open