One solution would be to copy the offending styles to Composer, edit the volume levels of all parts in the Intros/Endings and then store them to SD card, maybe under a slightly different name. Then use the modified styles from the SD card back to composer.
If there are quite a few styles which are giving you problems, you could edit them in Composer and then copy them one by one to Custom Memory, which would provide you with up to 20 'Immediate Load' modified styles.
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Willum
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Willum
After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley
( especially when the music is played on a KN7000....)