Lunar Magic is the main tool required for Super Mario World ROM hacking. It's very simple to use and only few help is needed. Hacking Super Mario World is recommended and the start for most hackers anyways, so go try it.
Hopefully sooner or later, there will be a LM hijack rom map so I can add a hex edit submission that causes the player's screen to always orientate to the center (like megaman and smbx). Here is the forum link to my problem.