website help - content management systems???

My GF is a graphic designer and is doing a website for a customer.
customer needs to be able to easily change some images and text on the site (when its up) without having to become a web programmer.
she is not techincal minded and as i work with computers she assumes that i would have a clue about how to do this. She is wrong i have no clue.
Anyway i have been looking into content management systems as the blurbs i have read seem to think they will do the trick.
Can anyone recommend a system for doing this?
I am in the process of looking at mambo http://www.mamboserver.com/
it seems a little full on for what it needs to do and I am having troubles installing it anyway.
So i guess what i am after is confirmation that i am heading in the right path with this content management stuff and hopefully some reccommendations on a good (free or very cheap) system to use.
thanks for the help.
customer needs to be able to easily change some images and text on the site (when its up) without having to become a web programmer.
she is not techincal minded and as i work with computers she assumes that i would have a clue about how to do this. She is wrong i have no clue.
Anyway i have been looking into content management systems as the blurbs i have read seem to think they will do the trick.
Can anyone recommend a system for doing this?
I am in the process of looking at mambo http://www.mamboserver.com/
it seems a little full on for what it needs to do and I am having troubles installing it anyway.
So i guess what i am after is confirmation that i am heading in the right path with this content management stuff and hopefully some reccommendations on a good (free or very cheap) system to use.
thanks for the help.