Show Gallery at the Property Page?

[thoom]

Hi Guys, its me again.

So I ran into a little thingie, hope anyone can help me out.
Im using the Agent theme for a carsales website. The person who's maintaining it hasnt been doing this for a long time (read he just started) and I want to make things as simple as possible.

We use the Property Listing to show cars. At the bottom, there is room for photo's, and here is where my question kicks in.
We would like to be able to show the default gallery at this particular part of space. I've been able to post like 20 pics here now, with changing some code... but when he is adding 20 pics, he needs to add 40 urls linking to large and small files.
It would be much more efficient if he could just upload 20 pics via the Word Press uploader and insert the entire gallery with one click on a button.

Does anyone have any suggestions how to make this happen?

Thank you in advance!!
Thomas