I am working on an iMac G3 running at 400 Mhz. I have 10.2.8 intalled and running great. When i first took on upgrading this machine it said that it could not install os 10.3 because it needed a firmware upgrade. I am wondering if i could install 10.3 now that i have installed 10.2.8. (Did it upgrade drivers with that install)? I guess i am currious if there is a limit to the highest sytem you can run on a OS X capable system. The ram is at 320 so that is not a short-come. It also contains a 2x AGP with an ATI rage w/8MB of vram i believe. It is a surprisingly responsive machine as it is and i just am looking for some of the functionality that come with the .3 upgrade. Any advice or help?