How to set-up a cracked minecraft 1.5.2 server? (No Hamachi)?

So I play on a cracked version of Minecraft with my friends when my teacher brings us to a computer lab during school. We open the world to lan. School is ending soon, and I want to continue playing the same world with my friends. How can I set up a server at home that we can play both at school and at home?

Added (1). Or if anyone has a download for craftbukkit 1.5.2, please link me it.

You know while your in that computer lab you can be learning actual networking technology and be putting them to good use like… I don't know say building your own cracked minecraft 1.5.2 server to run from home so that you all can play both at school and at home…