After you've done that just launch the game with the modded l2.ini where server IP is 127.0.0.1 and log in. L2net should then show your character and stats and everything and you're ready to bot.
I can only do IG too. Don't know why OOG doesn't work. It's weird.
Though it kinda sux that you always have to change the l2.ini if you want to start without Bot or with it.
Friend of mine plays there and it seems like a pretty good server.
It's really stable and not lagging, probably 300+ players but growing.
PVP seems to be 2-sided so far.
Not 100% sure about all that though... I Don't play there.