1. There's actually a 'new' browser in development at the moment, called Classilla. It's a Mozilla-based browser, and it's one of the few that doesn't suck for OS 9. http://www.floodgap.com:80/software/classilla/
2. If your iBook refuses to boot from the CD, make sure of a few things. First, that it is a proper install CD, next that your optical drive is working. If neither of those work, then you may just have a bum disk or drive.
3. The clamshells were discontinued in 2001; it's really not surprising that the battery doesn't do anything 8+ years later mate