How to add few pictures into one

[Lad]

bearophileHUGS at lycos.com wrote:
> Lad wrote:
> > I want to to do that as easy as possible.
>
> But not even more easy.
>
>
> > I think the easest way could be add( append) an image to another
> > into an image file so that I can use an image browser and see all
> > pictures in one file. Is that possible?
>
> Well, you can do it with PIL, creating a very big white image and
> putting on it all the images, as tiles.
> But probably you want to do something different.
> Maybe you can use PyUNO to create a PowerPoint-like (Presentation) file
> with an image on each page.
> If you are on Win another easy way is to create an Html page that shows
> all the pics, open it with Explorer and save it as a single HMT file.
> Probably there are other solutions.

I was thinking about much less complicated task.
I thought about this:
Open a picture file( download it from internet) and write it in a
result file( being open in binary mode).
Then download another file and append to the result file.
And so on...
But is it possible? Will be the pictures in the result file seen
well??
regards,
L.