"There is the open question of how tightly we should integrate/bundle I2P with Monero. I'm hoping people will like the idea of making it as easy as possible to "flip a switch" and have their Monero installation automatically run and use I2P."
"knaccc and I chatted about this subject in PM. My suggestion was to bundle the i2p-zero binary with the GUI binary. The GUI would then have a checkbox available where the user can enable i2p-zero, which would then start and subsequently run with some set of default parameters."
I looked at how to install it and there's just no way your average user can set it up manually.