Hacking MySQL 5!

I was trying to find the yacc grammar for mysql and I realized that the default Windows project distributed on mysql does not come with the yacc grammar with it. I am moving my development onto my Linux box running Slackware 10.0 and the hardware is a Pentium 4 2Ghz machine with 256MB RAM. I have just added a new function to mysql called 'whizkid' and I'm compiling the server now. I'll post step-by-step instructions on adding your own functions into the mysql core.