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Nick Hogan has scored a small win against Bubba The Love Sponge in his civil case against the radio host ... as a judge just ruled Bubba cannot -- at least temporarily -- use images from Hulk Hogan 's sex tape in his upcoming documentary.

Nick, as you know, sued Bubba earlier this week ... in an effort to block Hulk's former pal from dropping "Video Killed The Radio Star: The Untold Story Of The Hulk Hogan Sex Tape Scandal." Getty

Nick -- acting as a rep for Hulk's estate -- argued the work infringes on his dad's copyrights and trademarks. He also claimed if it was released, it would violate a settlement agreement Bubba and Hulk previously entered into.

On Thursday, a federal judge in Florida granted Nick's emergency motion for a temporary restraining order and p

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