Make Bootable CD

I am tried to make bootable cd my own. I couldn’t make that work. I tried Nero and Roxio to create bootable CD; it works but it is limited to floppy disk size. Even if i added files my own to cd, it won’t be availabe after boot from cd. it seems bootable only sees whatever was in the boot imge.

Is there anybody know how to create own bootable cd? Not using Nero or Roxie..

thanks