changing images in php?

[elli]

Is it possible to write a simple php script that will allow a client to change their own pictures from a gallery that uses this script from dynamicdrive?

http://www.dynamicdrive.com/dynamici...agetooltip.htm

instead of using links I have used thumbnail images that pop up the big image.

I'm just at the beginning of learning php.
How advanced into it would I have to be to write a script that would do this?

[iblastoff]

if you can write a simple cms then you might be good to go.