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Comprehending the problem, it seems like you are troubled with virus detection towards BX-LF2.
Some moleboxed programs have these problems as well, and Norton is one of tricky ones. Along with A-Man's advices, there's not much to say.
But if you believe a mod with less BX-LF2 characters is useful for you, you may ask the creator. He should have the resources to repack a version for you, though it needs some time, especially with stages problems.
Unfortunately the repacked version might still suffer from virus false alarms, but the special version will prove secure to himself.
Some moleboxed programs have these problems as well, and Norton is one of tricky ones. Along with A-Man's advices, there's not much to say.
But if you believe a mod with less BX-LF2 characters is useful for you, you may ask the creator. He should have the resources to repack a version for you, though it needs some time, especially with stages problems.
Unfortunately the repacked version might still suffer from virus false alarms, but the special version will prove secure to himself.