Okay everybody, be gentle now, im a new guy. Im just starting out with rom hacking, with lunar magic.  I need to know exactly how to be able to play my custom rom.

I do have SnesTool
I have tried creating and applying a patch
i have tried playing the rom itself without a patch

neither of those last two work. what can i do?

I thought Lunar Magic would only accept a US or Japanese ROM that passes the checksum?
Just choose "Save Level to ROM" then open it with an emulator.