How to edit video to audio with a sub-frame precision?

As all of my other posts I must begin by stating that this is not an RTFM issue. I have read the manuals and searched the web and this forum already.
Also I beg you to read this question first before answering some nonsense. Ok, off the soapbox now.
I am having issue synching video to audio.
I am editing a music video at the moment at 23.976 fps. There is a master sound track (48/16) to which all of the video must be synched.
I have not found a way of changing the position of a video clips in the timeline relative of the master audio track with a higher than a frame precision in order to obtain a perfect lip-sync.
I am aware of the fact that one should enable "display audio units" in the timeline in order to shift an audio track relative the video with the sub frame precision, which is very useful when doing dialogue replacement to a video. For the video I am still not able to do so. Is it at all possible? Is there a workaround?
How do they achieve a perfect lipsync when they make professional music videos?
Thank you!

Actually, you can set markers on the audio clip between frames. I rember this from Jacob Robenbergs book Premiere Pro 2.0 Studio Techniques.
You double click on the audio clip. It opens in the Source monitor. Then click on the fly-out menu and select SHOW AUDIO UNITS.
Now in the source monitor you can place a marker (to be used for syncing) anyhere within the frame. Set a numbered marker.
Now you have a sync marker intraframe on the Audio. You then sync this audio marker the Frame you need. Select both clips and choose syncronize.
So it is not sub video frame, it is sub Audio frame to the correct video frame start.
See below. The audio sync marker is in the middle of the frame. Hope this helps.

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