Hi George..  thanks for getting back re my question. I fear I havent made my query quite clear. 

I have been using this program for a few years and am used to the length of time it takes to burn a long slideshow. initially. From what I gather from fellow users the time is not out of the ordinary considering the number of photos I use.

As you say , of course I have to burn to DVD once again. If I burn a second and unchanged Disk project the burn time is reduced dramatically. I was kind of hoping that if it was only a very minor change to the slideshow that maybe the program would have a facility to just address the encoding of the changes while leaving the rest of the show as original and not go through the complete process of encoding all again. I guess I know what the answer is going to be !....but thanks for you patience.   John.

Hi John,

I should have checked your membership status before posting my original answer then I would have realized that you have experience.  Most questions I see are from new users, so I focused in on the "which took forever" part of the question.  I seem to recall johnebaker answering a question not too long ago that talked about how to do something very similar to what you are asking that probably won't help you this time but could help in the future.  I searched back a few days but could not find it.

With any luck, John will spot this post and give you the answer that I can't seem to find.

Good Luck

Hi

I think George is referring to this topic 

Here are some tips:

I do a trial burn to rewriteable DVD-RW discs for testing - once I have what I want and the DVD is good, I generally copy the rewriteable to DVD-R using Nero. 

The rewriteables can be erased many times and save money if you get a dud.  If the DVD-RW does not play properly, or you need to make further changes to the movie, then you can erase the disc and use it again.

You can also use the image recorder to create an iso image of the disc without having to use a disc at all.

I also use this method for testing - to load the iso I use MagicIso Virtual CD/DVD manager - also, if I know I am going to burn many copies of the same disc, I use an iso image rather than disc copy and burn with Nero - this is quicker than disc copying.

I always keep a master disc of the finished movie to create more copies from - these are always stored in black DVD cases out of direct sunlight which can affect discs long term.

If it seems contradictory to use iso images and master discs this is because I am very concious of losing data and make multiple backups to 3 external hard drives each one being an identical image of my working hard drive - these are powered up only when I do the backups or I need to recover files that I have deleted then find I need again.

John