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That having been said, I would suggest that this is a losing battle.
First, your user agreement with Tripod would probably prohibit this and doing it could cause them to close your account.
Second, any code you could find to accomplish this would probably be disabled by the Tripod programmers very shortly.
They are able to provide you with free hosting based on the advertising they can sell. If all their users voided that advertising, their revenues would disappear, along with their free hosting service.
Sorry,
Tom