TFT and 100 levels queston

How do you go past 10 levels in TFT? Is it something I am missing, or do you use miscdata.txt?

If its only miscdata how do you go about putting it in map? Is it like editing spells?

It's under Advanced -> Gameplay Constants

Then just scroll down to 'Hero Maximum Level' and change to your heart's content

That will save alot of work, and will actually work multiplayer.