Thanks everyone – I’m going to look into this, go shopping, and do something eventually. In all honesty, I have to own up to a blasphemy and confess that I’m not running a Mac OS on this box, I’m running Lubuntu 12.04 Ppc, so I don’t know if that changes any of the booting parameters or not. I do know that all the Linux distros I've tried boot off the native "yaboot" and don't replace with another boot loader.
I’ve posted about this machine here before. When I bought it at a garage sale for $20, it had Mac OS 9 installed and you could clock the response time with a sundial. I wiped the hard drive and have experimented with several Linux distros all of which run decently (some better than others – the fastest so far is Mint Linux Ppc, but with my weak skills I can’t keep from nuking it back to a command line interface). But all are just a tick slower than I’d like - wouldn’t we all like our computers to run faster? Anyway, maybe if I had been able to reinstall OS 9 I would have seen a difference, but I didn’t have the disks.
I like Lubuntu on this machine; it’s very stable and I haven’t been able to kill it yet. But as I had always understood Macs were supposed to run faster than similarly powered PC’s, this one has always been a bit of a slug, and yes, I do understand that I only have a 450Mhz. processor here. It was suggested on this forum that perhaps my hard drive was worn out and a replacement might improve things – ergo, this post. Success or failure, I’ll post my results and hopefully we’ll all learn something from it.