Just a reminder that providing specifics on, sharing links to, or naming websites where ROMs can be accessed is against the rules. If your post has any of this information it will be removed.
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Well to start playing the game you would need to patch the patch into the ROM. You need LIPS (Lunar IPS) which comes with Elite Map. Just make sure you patch it to the right game version and that the ROM is a clean/new version. If you have any problems just PM me and I can help you.
Alternatively, you could just put the patch in the same folder the ROM is in and change the patch name to match that of the ROM's. This only works with VBA, though.
...and another one. Please, before creating a new thread, use the search function, and read the stickied threads of the ROM-Hacking forums.
They're there for a reason.