Lock slide to section of audio track -- is it possible?

[mhwarner]

Hopefully I can make myself clear.  I am creating a music video with stills and video clips.  I would like to somehow lock certain images or videos to specific spots on the audio so that they will show when that portion of the music plays.  It is a single audio track.  I would like to be able to then experiment with adding other slides or videos of varying lengths in between the ones that are locked without shifting the ones that are locked.  I have searched through the oneline help and this forum but so far haven't come up with anything.  Is it even possible.  My only thought was to split the audio clip at each of these points and use the functionality of linking a slide to an audio track (which is normally used for voice over commentary but this would be cumbersome.  Any suggestions would be appreciated.