How to change the fist few minutes of a webinar recording to show a fixed frame video image without changing the underlying audio recording

I recorded a webinar that shows the PowerPoint edit mode screen instead of the slideshow screen during the first few minutes.  Now I want to use Adobe Premiere Elements to put the beginning PowerPoint title slide to be displayed during the first few minutes, but not disturb the underlying audio recording.  How would that be accomplished?  Thanks in advance for insight.
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I haven't used Premiere in a long time, but the gist would be to insert/import the title slide image and then place it on the video track at the beginning and fade into the rest of the video at the appropriate time.

To get the title slide image out of PowerPoint, select the title slide and choose File | Save As and choose PNG from the Save as Type dropdown. You'll be prompted to save only the current slide or to save every slide as an image. Opt for the current slide. That's the image you'll need to import into Premiere.
bbaumbergerConsultantAuthor Commented:
Good suggestion, but did not explain how to accomplish the task in Premiere Elements.  Since there were no other comments or solutions offered, let's close this question.
You may not be able to do this unless you have the original power point files, I'd add in the still frame into power point then  stretch the audio time frame in power point
to change any of these settings, double-click on the CD icon and change the settings using Sound Tools tab.
which version of power point
you still want to keep this as a Power point show? or a video?
If it is a video power point and you want to add in the still and keep the audio track same principal stretch the audio length.
I do this Cyberlink power director, on the time line I have both audio in a separate track with video on top
 I can grab the audio track under the  video and pull it out so it matches the video length
this youtube video should help

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bbaumbergerConsultantAuthor Commented:
Good suggestions for video editing.  Thanks!
Thank you
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