What maker are you using? VXA?
For VXA, there is an easy option to make the player transparent (as well as his party followers), which you could do during a cutscene (if you wish for the player to not be present during the scene).
And, as IAMFORTE said, they players shouldn't move during the cutscene if it's set to "autorun". I believe that they can move during most of the parallel processing commands, though. So, you'd want to avoid using those for awhile. They're a bit more complex.
(It's hard to recall without actually looking at the maker.
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