Roy, Webmin and ISPConfig 3 both have many of the features that you get in cPanel.
He is using the user's home page at his ISP, so he will likely not be able to use either.
Did you look at the link he posted above? He's on a sub directory of classiccmp.org. So it really depends on how this is setup. If all he has is a chrooted ftp login his options are limited. But if they give him access to the OS that's a different matter. At any rate I had forgotten he had said he was on a slow DSL.
I glanced at it. I am assuming they didn't give him access to the OS. I could be wrong