This unofficial update looks really cool

As someone who grew up with classic Macs in primary and then the coloured imacs running 10.2 in intermediate school (but never had the money for one of my own back then), its taken me a while to get into classic Mac OS because all my work is done in Final Cut Pro X and Sierra.
I'm just wondering, will it work on my G4 1.42ghz dual processor Mac? I know its not officially supported by OS9, if your build doesn't add support for the non-supported G4s then I'll still happily have to give this a try on my 466mhz G4 and even my newly acquired G3 iBook clamshell.
I like what I'm reading in terms of what you have accomplished and I'm wondering, has any moves been made toward allowing for bigger hard drive partitions than 190 or better memory?