>MP4 file that I have saved as a .PREL file
First... that is impossible... I think you are mixing terms (see more information below)
An MP4 is a video file, a PREL is a project file that points to a video file (and lots of other things)
To find out exactly what is inside that file...
A screen shot works well to SHOW people what you are doing http://forums.adobe.com/thread/592070?tstart=30
Now... the more information
Online User Guide http://help.adobe.com/en_US/premiereelements/using/index.html
-Page to download current PDF http://helpx.adobe.com/premiere-elements.html
-Previous versions http://helpx.adobe.com/premiere-elements/archive.html
Importing Video http://forums.adobe.com/thread/1065281
-and project settings http://forums.adobe.com/thread/1112086
Saving & Sharing http://forums.adobe.com/thread/1137128
-Sharing to DVD or BluRay http://forums.adobe.com/thread/1137645
-Sharing for Movies http://forums.adobe.com/thread/1051093
-Sharing for Computer http://forums.adobe.com/thread/1058237
Steve's Basic Training Tutorials... steps are the same for several versions
Wow! That's great!
Very many thanks for letting me know and for the multitude of links.
I'll start work straight away.
Thank you again.