Changing Launcher's Properties

Is there a way to easily change the properties of John's launchers?

For example, I'd like to change PortableFirefox.exe's icon and cut down the comment section so that it isn't so darned long (it shows up in the autorun box)!

And while I realize that there is probably a way to recompile the launcher to have this changed, that is an overly complex method for those of us who rely on most portable app's ease of use and would rather not touch the code ourselves.

~Abecedarian