Dana Carvey still wants to pump you up. He and cowriters, including Conan O'Brien and Kevin Nealon, have completed a script for a big-screen version of Hans and Franz — Saturday Night Live's bodybuilders — that finds the two in search of their idol, Arnold Schwarzenegger. The twist? ''It's a musical,'' says Carvey. The catch? Arnold hasn't agreed to costar. ''We're trying to get him,'' says Carvey, ''but he's a busy man.'' Especially since he'll need to take singing lessons before filming begins. ''We want him to do the movie's theme song, 'No One Knows What a Muscle Man Feels,''' says Carvey.


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