Hi Geoff,
This is how I would do it!
Bearing in mind that the ALBUM contains only shortcuts /pointers to the actual images, (to avoid having multiple space wasting copies of images), I would use COPY.

While in the Album, Right click on the selected image. The select COPY from the drop down menu.
Overwrite the selected blue filename with your special name, and say OK.
That will make a duplicate of the original but with a new name. You can delete the original file from the Album, and you are left with the newly named image.

That's all I can think of at the moment....

Fred

Thanks to both Fred and Mike - my first posting and very prompt response. 

I would ideally like to keep just one copy of my file so although the copy option would work it would mean that I actually had 2 copies of the file.
The description feature looks like it will do what I want - thanks Mike.

Regards,
Geoff

Hi Fred,

Yes, I appreciate that albums only contain 'pointers' to the actual files.
I must be missing something in what you are saying.

What I want is to maintain the original file with its original name but for the album entry to use a different name - an alias, if you like.  Mike's description idea will do this for me.

Thanks,
Geoff

Goeff,
I was playing around trying to find a way for you to accomplish what you want, or close to it, and I remembered how.
I forgot there is a REMOVE from Album selection in the Right Mouse menu when you select a thumb while in your album.

So that means that you can create your album, do a COPY to a new name in your album. That leaves you with two images, one a copy with a new name, and the other, the original.
You want to keep the original image in the original folder, but get rid of the same file from the album, no longer needed.
Select that image from the Album folder, right click, and select remove from ALBUM

Now you have the renamed copy in the Album, and the original file still in the original folder.

Hopefully,
Fred