Avena Engine is my engine it's not public as of now, but there are other ps2 game engines that are public one very well known one is Tyra Engine and AthenaENV, you can take a look at those,
Avena engine will become public in the near future tho if you want to wait for that as well
I'll look into those options, thanks! Might wait. Also hoping devs find ways to boot off of unmodded PS2s. Don't know why FreeDVDBoot isn't being used. I know one group who is aware of it and doesn't use it.