Recently I just use fienix, it has great software precompiled in its repositories, it's debian based so you can get tons of software and with little work you get a working ppc linux experience (mostly to get the first upgrade that solves lightdm issues in my powerbook 15 fw and MDD G4 both with ATI Radeon 9600), it's true that it doesn't update frequently but you get recent web browser versions of sealion and arcticfox (I don't know what it's the web browser experience in adelie, in fienix it's pretty good). It's not the answer that you want but give it a try. It has no live enviroment, so you have to install it and go through to get your graphics card to work, from there it's simple to get software using the repositories or manually .deb