Installer Wrappers for Executable Jar with Dependencies

Question

I've written a program in Java (executable JAR) and need to create an installer for it. The installer needs to have the following qualities:

1. Must work in Windows AND Mac environments.
2. Allows for the usual "Next -> Next -> Install" installer prompts. (Ease of use for customers)
3. Must allow exact placement of external dependencies.

Note (#3): Many of the external dependencies need to be placed in the same directory as the executable jar for the program to work correctly.

And it would be nice if it was easy to configure. It doesn't have to be free, if it costs a few bucks and is very simple, please include it.

Thanks.

EDIT: Please no "that's stupid, redesign" comments/answers. I didn't choose to make the program with external dependencies, it was specified by my employer for certain reasons. I make it their way or they find someone else who will.

Answer 1

Use IzPack. It's free, and allows for building installers for Windows and MacOS. Not sure about the #3 requirement, but it's a installer, so you should be able to just feed it with files, and specify install paths for them.