For the 68kMLA. Here's the latest compile of LeopardAssist 3 (Release Candidate 2) for testing.

https://app.box.com/s/pc9cubid70edtgrmw4dj

I've successfully tested it on my iMac G4, however some changes that need particular attention:

• LeopardAssist should now throw an error when being run on Mac OS X versions lower than Panther 10.3. No such messages should occur when being run on Panther 10.3 or later.
  
• LeopardAssist now supports G5-based Macs! While it won't change clock frequencies, it can still customise the boot device and startup mode (boot-args).
  
• Boot From USB is now supported. This may not work in all circumstances. If you can type boot ud:,\\:tbxi into Open Firmware and boot from USB, then LeopardAssist will support your machine.
  
• The Hard Drive boot device option now writes boot hd:,\\:tbxi to the NVRAM instead of simply using mac-boot.
  
• Minor changes to how the NVRAM script is generated by LeopardAssist. You can check to make sure it all looks good before applying it by clicking Tools > View NVRAM Script at the Applying Changes step.
  
• New documentation at the Read Me First stage, including information about potential issues such as Firmware Updates and Third Party Processor Upgrades.

Some features that haven't been added include Outdated Firmware Detection (since this would be incredibly complex and would require a lot of research, possibly a future release could finally tackle this issue) and Bootable LeopardAssist media, which I am still looking in to in order to determine if it's feasible without writing an entirely custom boot loader and minimal system.

Feedback is encouraged.

Cheers,

~ Mic.